Class CreateStackRequest

java.lang.Object
software.amazon.awssdk.core.SdkRequest
software.amazon.awssdk.awscore.AwsRequest
software.amazon.awssdk.services.cloudformation.model.CloudFormationRequest
software.amazon.awssdk.services.cloudformation.model.CreateStackRequest
All Implemented Interfaces:
SdkPojo, ToCopyableBuilder<CreateStackRequest.Builder,CreateStackRequest>
@Generated("software.amazon.awssdk:codegen") public final class CreateStackRequest extends CloudFormationRequest implements ToCopyableBuilder<CreateStackRequest.Builder,CreateStackRequest>

The input for CreateStack action.

  • Method Details

    • stackName

      public final String stackName()

      The name that's associated with the stack. The name must be unique in the Region in which you are creating the stack.

      A stack name can contain only alphanumeric characters (case sensitive) and hyphens. It must start with an alphabetical character and can't be longer than 128 characters.

      Returns:
      The name that's associated with the stack. The name must be unique in the Region in which you are creating the stack.

      A stack name can contain only alphanumeric characters (case sensitive) and hyphens. It must start with an alphabetical character and can't be longer than 128 characters.

    • templateBody

      public final String templateBody()

      Structure containing the template body with a minimum length of 1 byte and a maximum length of 51,200 bytes.

      Conditional: You must specify either the TemplateBody or the TemplateURL parameter, but not both.

      Returns:
      Structure containing the template body with a minimum length of 1 byte and a maximum length of 51,200 bytes.

      Conditional: You must specify either the TemplateBody or the TemplateURL parameter, but not both.

    • templateURL

      public final String templateURL()

      Location of file containing the template body. The URL must point to a template (max size: 460,800 bytes) that's located in an Amazon S3 bucket or a Systems Manager document. The location for an Amazon S3 bucket must start with https://.

      Conditional: You must specify either the TemplateBody or the TemplateURL parameter, but not both.

      Returns:
      Location of file containing the template body. The URL must point to a template (max size: 460,800 bytes) that's located in an Amazon S3 bucket or a Systems Manager document. The location for an Amazon S3 bucket must start with https://.

      Conditional: You must specify either the TemplateBody or the TemplateURL parameter, but not both.

    • hasParameters

      public final boolean hasParameters()
      For responses, this returns true if the service returned a value for the Parameters property. This DOES NOT check that the value is non-empty (for which, you should check the isEmpty() method on the property). This is useful because the SDK will never return a null collection or map, but you may need to differentiate between the service returning nothing (or null) and the service returning an empty collection or map. For requests, this returns true if a value for the property was specified in the request builder, and false if a value was not specified.

    • parameters

      public final List<Parameter> parameters()

      A list of Parameter structures that specify input parameters for the stack. For more information, see the Parameter data type.

      Attempts to modify the collection returned by this method will result in an UnsupportedOperationException.

      This method will never return null. If you would like to know whether the service returned this field (so that you can differentiate between null and empty), you can use the hasParameters() method.

      Returns:
      A list of Parameter structures that specify input parameters for the stack. For more information, see the Parameter data type.

    • disableRollback

      public final Boolean disableRollback()

      Set to true to disable rollback of the stack if stack creation failed. You can specify either DisableRollback or OnFailure, but not both.

      Default: false

      Returns:
      Set to true to disable rollback of the stack if stack creation failed. You can specify either DisableRollback or OnFailure, but not both.

      Default: false

    • rollbackConfiguration

      public final RollbackConfiguration rollbackConfiguration()

      The rollback triggers for CloudFormation to monitor during stack creation and updating operations, and for the specified monitoring period afterwards.

      Returns:
      The rollback triggers for CloudFormation to monitor during stack creation and updating operations, and for the specified monitoring period afterwards.

    • timeoutInMinutes

      public final Integer timeoutInMinutes()

      The amount of time that can pass before the stack status becomes CREATE_FAILED; if DisableRollback is not set or is set to false, the stack will be rolled back.

      Returns:
      The amount of time that can pass before the stack status becomes CREATE_FAILED; if DisableRollback is not set or is set to false, the stack will be rolled back.

    • hasNotificationARNs

      public final boolean hasNotificationARNs()
      For responses, this returns true if the service returned a value for the NotificationARNs property. This DOES NOT check that the value is non-empty (for which, you should check the isEmpty() method on the property). This is useful because the SDK will never return a null collection or map, but you may need to differentiate between the service returning nothing (or null) and the service returning an empty collection or map. For requests, this returns true if a value for the property was specified in the request builder, and false if a value was not specified.

    • notificationARNs

      public final List<String> notificationARNs()

      The Amazon SNS topic ARNs to publish stack related events. You can find your Amazon SNS topic ARNs using the Amazon SNS console or your Command Line Interface (CLI).

      Attempts to modify the collection returned by this method will result in an UnsupportedOperationException.

      This method will never return null. If you would like to know whether the service returned this field (so that you can differentiate between null and empty), you can use the hasNotificationARNs() method.

      Returns:
      The Amazon SNS topic ARNs to publish stack related events. You can find your Amazon SNS topic ARNs using the Amazon SNS console or your Command Line Interface (CLI).

    • capabilities

      public final List<Capability> capabilities()

      In some cases, you must explicitly acknowledge that your stack template contains certain capabilities in order for CloudFormation to create the stack.

      • CAPABILITY_IAM and CAPABILITY_NAMED_IAM

        Some stack templates might include resources that can affect permissions in your Amazon Web Services account; for example, by creating new IAM users. For those stacks, you must explicitly acknowledge this by specifying one of these capabilities.

        The following IAM resources require you to specify either the CAPABILITY_IAM or CAPABILITY_NAMED_IAM capability.

        • If you have IAM resources, you can specify either capability.

        • If you have IAM resources with custom names, you must specify CAPABILITY_NAMED_IAM.

        • If you don't specify either of these capabilities, CloudFormation returns an InsufficientCapabilities error.

        If your stack template contains these resources, we recommend that you review all permissions associated with them and edit their permissions if necessary.

        For more information, see Acknowledging IAM resources in CloudFormation templates.

      • CAPABILITY_AUTO_EXPAND

        Some template contain macros. Macros perform custom processing on templates; this can include simple actions like find-and-replace operations, all the way to extensive transformations of entire templates. Because of this, users typically create a change set from the processed template, so that they can review the changes resulting from the macros before actually creating the stack. If your stack template contains one or more macros, and you choose to create a stack directly from the processed template, without first reviewing the resulting changes in a change set, you must acknowledge this capability. This includes the AWS::Include and AWS::Serverless transforms, which are macros hosted by CloudFormation.

        If you want to create a stack from a stack template that contains macros and nested stacks, you must create the stack directly from the template using this capability.

        You should only create stacks directly from a stack template that contains macros if you know what processing the macro performs.

        Each macro relies on an underlying Lambda service function for processing stack templates. Be aware that the Lambda function owner can update the function operation without CloudFormation being notified.

        For more information, see Perform custom processing on CloudFormation templates with template macros.

      Only one of the Capabilities and ResourceType parameters can be specified.

      Attempts to modify the collection returned by this method will result in an UnsupportedOperationException.

      This method will never return null. If you would like to know whether the service returned this field (so that you can differentiate between null and empty), you can use the hasCapabilities() method.

      Returns:
      In some cases, you must explicitly acknowledge that your stack template contains certain capabilities in order for CloudFormation to create the stack.

      • CAPABILITY_IAM and CAPABILITY_NAMED_IAM

        Some stack templates might include resources that can affect permissions in your Amazon Web Services account; for example, by creating new IAM users. For those stacks, you must explicitly acknowledge this by specifying one of these capabilities.

        The following IAM resources require you to specify either the CAPABILITY_IAM or CAPABILITY_NAMED_IAM capability.

        • If you have IAM resources, you can specify either capability.

        • If you have IAM resources with custom names, you must specify CAPABILITY_NAMED_IAM.

        • If you don't specify either of these capabilities, CloudFormation returns an InsufficientCapabilities error.

        If your stack template contains these resources, we recommend that you review all permissions associated with them and edit their permissions if necessary.

        For more information, see Acknowledging IAM resources in CloudFormation templates.

      • CAPABILITY_AUTO_EXPAND

        Some template contain macros. Macros perform custom processing on templates; this can include simple actions like find-and-replace operations, all the way to extensive transformations of entire templates. Because of this, users typically create a change set from the processed template, so that they can review the changes resulting from the macros before actually creating the stack. If your stack template contains one or more macros, and you choose to create a stack directly from the processed template, without first reviewing the resulting changes in a change set, you must acknowledge this capability. This includes the AWS::Include and AWS::Serverless transforms, which are macros hosted by CloudFormation.

        If you want to create a stack from a stack template that contains macros and nested stacks, you must create the stack directly from the template using this capability.

        You should only create stacks directly from a stack template that contains macros if you know what processing the macro performs.

        Each macro relies on an underlying Lambda service function for processing stack templates. Be aware that the Lambda function owner can update the function operation without CloudFormation being notified.

        For more information, see Perform custom processing on CloudFormation templates with template macros.

      Only one of the Capabilities and ResourceType parameters can be specified.

    • hasCapabilities

      public final boolean hasCapabilities()
      For responses, this returns true if the service returned a value for the Capabilities property. This DOES NOT check that the value is non-empty (for which, you should check the isEmpty() method on the property). This is useful because the SDK will never return a null collection or map, but you may need to differentiate between the service returning nothing (or null) and the service returning an empty collection or map. For requests, this returns true if a value for the property was specified in the request builder, and false if a value was not specified.

    • capabilitiesAsStrings

      public final List<String> capabilitiesAsStrings()

      In some cases, you must explicitly acknowledge that your stack template contains certain capabilities in order for CloudFormation to create the stack.

      • CAPABILITY_IAM and CAPABILITY_NAMED_IAM

        Some stack templates might include resources that can affect permissions in your Amazon Web Services account; for example, by creating new IAM users. For those stacks, you must explicitly acknowledge this by specifying one of these capabilities.

        The following IAM resources require you to specify either the CAPABILITY_IAM or CAPABILITY_NAMED_IAM capability.

        • If you have IAM resources, you can specify either capability.

        • If you have IAM resources with custom names, you must specify CAPABILITY_NAMED_IAM.

        • If you don't specify either of these capabilities, CloudFormation returns an InsufficientCapabilities error.

        If your stack template contains these resources, we recommend that you review all permissions associated with them and edit their permissions if necessary.

        For more information, see Acknowledging IAM resources in CloudFormation templates.

      • CAPABILITY_AUTO_EXPAND

        Some template contain macros. Macros perform custom processing on templates; this can include simple actions like find-and-replace operations, all the way to extensive transformations of entire templates. Because of this, users typically create a change set from the processed template, so that they can review the changes resulting from the macros before actually creating the stack. If your stack template contains one or more macros, and you choose to create a stack directly from the processed template, without first reviewing the resulting changes in a change set, you must acknowledge this capability. This includes the AWS::Include and AWS::Serverless transforms, which are macros hosted by CloudFormation.

        If you want to create a stack from a stack template that contains macros and nested stacks, you must create the stack directly from the template using this capability.

        You should only create stacks directly from a stack template that contains macros if you know what processing the macro performs.

        Each macro relies on an underlying Lambda service function for processing stack templates. Be aware that the Lambda function owner can update the function operation without CloudFormation being notified.

        For more information, see Perform custom processing on CloudFormation templates with template macros.

      Only one of the Capabilities and ResourceType parameters can be specified.

      Attempts to modify the collection returned by this method will result in an UnsupportedOperationException.

      This method will never return null. If you would like to know whether the service returned this field (so that you can differentiate between null and empty), you can use the hasCapabilities() method.

      Returns:
      In some cases, you must explicitly acknowledge that your stack template contains certain capabilities in order for CloudFormation to create the stack.

      • CAPABILITY_IAM and CAPABILITY_NAMED_IAM

        Some stack templates might include resources that can affect permissions in your Amazon Web Services account; for example, by creating new IAM users. For those stacks, you must explicitly acknowledge this by specifying one of these capabilities.

        The following IAM resources require you to specify either the CAPABILITY_IAM or CAPABILITY_NAMED_IAM capability.

        • If you have IAM resources, you can specify either capability.

        • If you have IAM resources with custom names, you must specify CAPABILITY_NAMED_IAM.

        • If you don't specify either of these capabilities, CloudFormation returns an InsufficientCapabilities error.

        If your stack template contains these resources, we recommend that you review all permissions associated with them and edit their permissions if necessary.

        For more information, see Acknowledging IAM resources in CloudFormation templates.

      • CAPABILITY_AUTO_EXPAND

        Some template contain macros. Macros perform custom processing on templates; this can include simple actions like find-and-replace operations, all the way to extensive transformations of entire templates. Because of this, users typically create a change set from the processed template, so that they can review the changes resulting from the macros before actually creating the stack. If your stack template contains one or more macros, and you choose to create a stack directly from the processed template, without first reviewing the resulting changes in a change set, you must acknowledge this capability. This includes the AWS::Include and AWS::Serverless transforms, which are macros hosted by CloudFormation.

        If you want to create a stack from a stack template that contains macros and nested stacks, you must create the stack directly from the template using this capability.

        You should only create stacks directly from a stack template that contains macros if you know what processing the macro performs.

        Each macro relies on an underlying Lambda service function for processing stack templates. Be aware that the Lambda function owner can update the function operation without CloudFormation being notified.

        For more information, see Perform custom processing on CloudFormation templates with template macros.

      Only one of the Capabilities and ResourceType parameters can be specified.

    • hasResourceTypes

      public final boolean hasResourceTypes()
      For responses, this returns true if the service returned a value for the ResourceTypes property. This DOES NOT check that the value is non-empty (for which, you should check the isEmpty() method on the property). This is useful because the SDK will never return a null collection or map, but you may need to differentiate between the service returning nothing (or null) and the service returning an empty collection or map. For requests, this returns true if a value for the property was specified in the request builder, and false if a value was not specified.

    • resourceTypes

      public final List<String> resourceTypes()

      The template resource types that you have permissions to work with for this create stack action, such as AWS::EC2::Instance, AWS::EC2::*, or Custom::MyCustomInstance. Use the following syntax to describe template resource types: AWS::* (for all Amazon Web Services resources), Custom::* (for all custom resources), Custom::logical_ID (for a specific custom resource), AWS::service_name::* (for all resources of a particular Amazon Web Services service), and AWS::service_name::resource_logical_ID (for a specific Amazon Web Services resource).

      If the list of resource types doesn't include a resource that you're creating, the stack creation fails. By default, CloudFormation grants permissions to all resource types. IAM uses this parameter for CloudFormation-specific condition keys in IAM policies. For more information, see Control access with Identity and Access Management.

      Only one of the Capabilities and ResourceType parameters can be specified.

      Attempts to modify the collection returned by this method will result in an UnsupportedOperationException.

      This method will never return null. If you would like to know whether the service returned this field (so that you can differentiate between null and empty), you can use the hasResourceTypes() method.

      Returns:
      The template resource types that you have permissions to work with for this create stack action, such as AWS::EC2::Instance, AWS::EC2::*, or Custom::MyCustomInstance. Use the following syntax to describe template resource types: AWS::* (for all Amazon Web Services resources), Custom::* (for all custom resources), Custom::logical_ID (for a specific custom resource), AWS::service_name::* (for all resources of a particular Amazon Web Services service), and AWS::service_name::resource_logical_ID (for a specific Amazon Web Services resource).

      If the list of resource types doesn't include a resource that you're creating, the stack creation fails. By default, CloudFormation grants permissions to all resource types. IAM uses this parameter for CloudFormation-specific condition keys in IAM policies. For more information, see Control access with Identity and Access Management.

      Only one of the Capabilities and ResourceType parameters can be specified.

    • roleARN

      public final String roleARN()

      The Amazon Resource Name (ARN) of an IAM role that CloudFormation assumes to create the stack. CloudFormation uses the role's credentials to make calls on your behalf. CloudFormation always uses this role for all future operations on the stack. Provided that users have permission to operate on the stack, CloudFormation uses this role even if the users don't have permission to pass it. Ensure that the role grants least privilege.

      If you don't specify a value, CloudFormation uses the role that was previously associated with the stack. If no role is available, CloudFormation uses a temporary session that's generated from your user credentials.

      Returns:
      The Amazon Resource Name (ARN) of an IAM role that CloudFormation assumes to create the stack. CloudFormation uses the role's credentials to make calls on your behalf. CloudFormation always uses this role for all future operations on the stack. Provided that users have permission to operate on the stack, CloudFormation uses this role even if the users don't have permission to pass it. Ensure that the role grants least privilege.

      If you don't specify a value, CloudFormation uses the role that was previously associated with the stack. If no role is available, CloudFormation uses a temporary session that's generated from your user credentials.

    • onFailure

      public final OnFailure onFailure()

      Determines what action will be taken if stack creation fails. This must be one of: DO_NOTHING, ROLLBACK, or DELETE. You can specify either OnFailure or DisableRollback, but not both.

      Default: ROLLBACK

      If the service returns an enum value that is not available in the current SDK version, onFailure will return OnFailure.UNKNOWN_TO_SDK_VERSION. The raw value returned by the service is available from onFailureAsString().

      Returns:
      Determines what action will be taken if stack creation fails. This must be one of: DO_NOTHING, ROLLBACK, or DELETE. You can specify either OnFailure or DisableRollback, but not both.

      Default: ROLLBACK

      See Also:

    • onFailureAsString

      public final String onFailureAsString()

      Determines what action will be taken if stack creation fails. This must be one of: DO_NOTHING, ROLLBACK, or DELETE. You can specify either OnFailure or DisableRollback, but not both.

      Default: ROLLBACK

      If the service returns an enum value that is not available in the current SDK version, onFailure will return OnFailure.UNKNOWN_TO_SDK_VERSION. The raw value returned by the service is available from onFailureAsString().

      Returns:
      Determines what action will be taken if stack creation fails. This must be one of: DO_NOTHING, ROLLBACK, or DELETE. You can specify either OnFailure or DisableRollback, but not both.

      Default: ROLLBACK

      See Also:

    • stackPolicyBody

      public final String stackPolicyBody()

      Structure containing the stack policy body. For more information, see Prevent updates to stack resources in the CloudFormation User Guide. You can specify either the StackPolicyBody or the StackPolicyURL parameter, but not both.

      Returns:
      Structure containing the stack policy body. For more information, see Prevent updates to stack resources in the CloudFormation User Guide. You can specify either the StackPolicyBody or the StackPolicyURL parameter, but not both.

    • stackPolicyURL

      public final String stackPolicyURL()

      Location of a file containing the stack policy. The URL must point to a policy (maximum size: 16 KB) located in an S3 bucket in the same Region as the stack. The location for an Amazon S3 bucket must start with https://. You can specify either the StackPolicyBody or the StackPolicyURL parameter, but not both.

      Returns:
      Location of a file containing the stack policy. The URL must point to a policy (maximum size: 16 KB) located in an S3 bucket in the same Region as the stack. The location for an Amazon S3 bucket must start with https://. You can specify either the StackPolicyBody or the StackPolicyURL parameter, but not both.

    • hasTags

      public final boolean hasTags()
      For responses, this returns true if the service returned a value for the Tags property. This DOES NOT check that the value is non-empty (for which, you should check the isEmpty() method on the property). This is useful because the SDK will never return a null collection or map, but you may need to differentiate between the service returning nothing (or null) and the service returning an empty collection or map. For requests, this returns true if a value for the property was specified in the request builder, and false if a value was not specified.

    • tags

      public final List<Tag> tags()

      Key-value pairs to associate with this stack. CloudFormation also propagates these tags to the resources created in the stack. A maximum number of 50 tags can be specified.

      Attempts to modify the collection returned by this method will result in an UnsupportedOperationException.

      This method will never return null. If you would like to know whether the service returned this field (so that you can differentiate between null and empty), you can use the hasTags() method.

      Returns:
      Key-value pairs to associate with this stack. CloudFormation also propagates these tags to the resources created in the stack. A maximum number of 50 tags can be specified.

    • clientRequestToken

      public final String clientRequestToken()

      A unique identifier for this CreateStack request. Specify this token if you plan to retry requests so that CloudFormation knows that you're not attempting to create a stack with the same name. You might retry CreateStack requests to ensure that CloudFormation successfully received them.

      All events initiated by a given stack operation are assigned the same client request token, which you can use to track operations. For example, if you execute a CreateStack operation with the token token1, then all the StackEvents generated by that operation will have ClientRequestToken set as token1.

      In the console, stack operations display the client request token on the Events tab. Stack operations that are initiated from the console use the token format Console-StackOperation-ID, which helps you easily identify the stack operation . For example, if you create a stack using the console, each stack event would be assigned the same token in the following format: Console-CreateStack-7f59c3cf-00d2-40c7-b2ff-e75db0987002.

      Returns:
      A unique identifier for this CreateStack request. Specify this token if you plan to retry requests so that CloudFormation knows that you're not attempting to create a stack with the same name. You might retry CreateStack requests to ensure that CloudFormation successfully received them.

      All events initiated by a given stack operation are assigned the same client request token, which you can use to track operations. For example, if you execute a CreateStack operation with the token token1, then all the StackEvents generated by that operation will have ClientRequestToken set as token1.

      In the console, stack operations display the client request token on the Events tab. Stack operations that are initiated from the console use the token format Console-StackOperation-ID, which helps you easily identify the stack operation . For example, if you create a stack using the console, each stack event would be assigned the same token in the following format: Console-CreateStack-7f59c3cf-00d2-40c7-b2ff-e75db0987002.

    • enableTerminationProtection

      public final Boolean enableTerminationProtection()

      Whether to enable termination protection on the specified stack. If a user attempts to delete a stack with termination protection enabled, the operation fails and the stack remains unchanged. For more information, see Protect CloudFormation stacks from being deleted in the CloudFormation User Guide. Termination protection is deactivated on stacks by default.

      For nested stacks, termination protection is set on the root stack and can't be changed directly on the nested stack.

      Returns:
      Whether to enable termination protection on the specified stack. If a user attempts to delete a stack with termination protection enabled, the operation fails and the stack remains unchanged. For more information, see Protect CloudFormation stacks from being deleted in the CloudFormation User Guide. Termination protection is deactivated on stacks by default.

      For nested stacks, termination protection is set on the root stack and can't be changed directly on the nested stack.

    • retainExceptOnCreate

      public final Boolean retainExceptOnCreate()

      When set to true, newly created resources are deleted when the operation rolls back. This includes newly created resources marked with a deletion policy of Retain.

      Default: false

      Returns:
      When set to true, newly created resources are deleted when the operation rolls back. This includes newly created resources marked with a deletion policy of Retain.

      Default: false

    • toBuilder

      public CreateStackRequest.Builder toBuilder()
      Description copied from interface: ToCopyableBuilder
      Take this object and create a builder that contains all of the current property values of this object.
      Specified by:
      toBuilder in interface ToCopyableBuilder<CreateStackRequest.Builder,CreateStackRequest>
      Specified by:
      toBuilder in class CloudFormationRequest
      Returns:
      a builder for type T

    • builder

      public static CreateStackRequest.Builder builder()

    • serializableBuilderClass

      public static Class<? extends CreateStackRequest.Builder> serializableBuilderClass()

    • hashCode

      public final int hashCode()
      Overrides:
      hashCode in class AwsRequest

    • equals

      public final boolean equals(Object obj)
      Overrides:
      equals in class AwsRequest

    • equalsBySdkFields

      public final boolean equalsBySdkFields(Object obj)
      Description copied from interface: SdkPojo
      Indicates whether some other object is "equal to" this one by SDK fields. An SDK field is a modeled, non-inherited field in an SdkPojo class, and is generated based on a service model.

      If an SdkPojo class does not have any inherited fields, equalsBySdkFields and equals are essentially the same.

      Specified by:
      equalsBySdkFields in interface SdkPojo
      Parameters:
      obj - the object to be compared with
      Returns:
      true if the other object equals to this object by sdk fields, false otherwise.

    • toString

      public final String toString()
      Returns a string representation of this object. This is useful for testing and debugging. Sensitive data will be redacted from this string using a placeholder value.
      Overrides:
      toString in class Object

    • getValueForField

      public final <T> Optional<T> getValueForField(String fieldName, Class<T> clazz)
      Description copied from class: SdkRequest
      Used to retrieve the value of a field from any class that extends SdkRequest. The field name specified should match the member name from the corresponding service-2.json model specified in the codegen-resources folder for a given service. The class specifies what class to cast the returned value to. If the returned value is also a modeled class, the SdkRequest.getValueForField(String, Class) method will again be available.
      Overrides:
      getValueForField in class SdkRequest
      Parameters:
      fieldName - The name of the member to be retrieved.
      clazz - The class to cast the returned object to.
      Returns:
      Optional containing the casted return value

    • sdkFields

      public final List<SdkField<?>> sdkFields()
      Specified by:
      sdkFields in interface SdkPojo
      Returns:
      List of SdkField in this POJO. May be empty list but should never be null.