UpdateTopicRequest.fromJson constructor
      
      UpdateTopicRequest.fromJson(
    
    
- Map json_
Implementation
UpdateTopicRequest.fromJson(core.Map json_)
  : this(
      topic:
          json_.containsKey('topic')
              ? Topic.fromJson(
                json_['topic'] as core.Map<core.String, core.dynamic>,
              )
              : null,
      updateMask: json_['updateMask'] as core.String?,
    );