asFileMessage
Casts this RcsContent as a FileMessage and retrieves its aws.sdk.kotlin.services.pinpointsmsvoicev2.model.RcsFileMessage value. Throws an exception if the RcsContent is not a FileMessage.
Casts this RcsContent as a FileMessage and retrieves its aws.sdk.kotlin.services.pinpointsmsvoicev2.model.RcsFileMessage value. Throws an exception if the RcsContent is not a FileMessage.