anchor.diff:      String kind = "function";
       List<String> children = [];
       List<Map<String, dynamic>> parameters = [];
  +    String inferredReturnType = null;
       String returnType = null;
       String sideEffects = null;
       String code = "";
  
positive.code:     return {
        'id': id,
        'kind': 'field',
        'name': element.name,
        'children': children,
        'size': size,
  
negative.code:       'children': children,
        'size': size,
        'returnType': returnType,
        'inferredReturnType': inferredReturnType,
        'parameters': parameters,
        'sideEffects': sideEffects,
        'code': code,
  