describeRegistrationFieldDefinitions
inline suspend fun PinpointSmsVoiceV2Client.describeRegistrationFieldDefinitions(crossinline block: DescribeRegistrationFieldDefinitionsRequest.Builder.() -> Unit): DescribeRegistrationFieldDefinitionsResponse
Retrieves the specified registration type field definitions. You can use DescribeRegistrationFieldDefinitions to view the requirements for creating, filling out, and submitting each registration type.