span property
      
      SourceSpan
      get
      span
      
    
    
The source span for this node.
SourceSpan.message can be used to produce a human-friendly message about
this node.
Implementation
SourceSpan get span => _span;
The source span for this node.
SourceSpan.message can be used to produce a human-friendly message about
this node.
SourceSpan get span => _span;