Variables
@:value(cast "answer")@:impl@:enuminlineread onlyANSWER:SdpType = "answer"
@:value(cast "offer")@:impl@:enuminlineread onlyOFFER:SdpType = "offer"
@:value(cast "pranswer")@:impl@:enuminlineread onlyPRANSWER:SdpType = "pranswer"
@:value(cast "rollback")@:impl@:enuminlineread onlyROLLBACK:SdpType = "rollback"