MetricHeader.fromJson constructor
      
      MetricHeader.fromJson(
    
    
- Map json_
Implementation
MetricHeader.fromJson(core.Map json_)
    : this(
        name: json_.containsKey('name') ? json_['name'] as core.String : null,
        type: json_.containsKey('type') ? json_['type'] as core.String : null,
      );