whichTopic method
Implementation
PermissionsType_TopicPermissions_Topic whichTopic() =>
_PermissionsType_TopicPermissions_TopicByTag[$_whichOneof(1)]!;
PermissionsType_TopicPermissions_Topic whichTopic() =>
_PermissionsType_TopicPermissions_TopicByTag[$_whichOneof(1)]!;