describeRegistrationTypeDefinitions
inline suspend fun PinpointSmsVoiceV2Client.describeRegistrationTypeDefinitions(crossinline block: DescribeRegistrationTypeDefinitionsRequest.Builder.() -> Unit): DescribeRegistrationTypeDefinitionsResponse
Retrieves the specified registration type definitions. You can use DescribeRegistrationTypeDefinitions to view the requirements for creating, filling out, and submitting each registration type.