anchor.diff:  
       if (data.request != null) {
         params.add("${_getRef(data.request)} request");
  -      _writeParamComment(sink, "request", {"description": "${_getRef(data.request)} to send in this request"});
  +      _writeParamCommentHeader(sink, "request", "${_getRef(data.request)} to send in this request");
       }
       if (data.parameterOrder != null && data.parameters != null) {
         data.parameterOrder.forEach((param) {
  
positive.code:     if (uploadPath != null) {
        optParams.add("core.String content");
        optParams.add("core.String contentType");
        _writeParamComment(sink, "content", {"description": "Base64 Data of the file content to be uploaded"});
        _writeParamComment(sink, "contentType", {"description": "MimeType of the file to be uploaded"});
      }
      if (data.parameters != null) {
        data.parameters.forEach((name, JsonSchema description) {
          if (!genIncluded.contains(description)) {
            var type = _getDartType(description);
            var variable = escapeParameter(cleanName(name));
            _writeParamComment(sink, variable, description.toJson());
            if (description.repeated == true) {
              optParams.add("core.List<$type> $variable");
            } else {
  
negative.code:     }
  
      optParams.add("core.Map optParams");
      _writeParamCommentHeader(sink, "optParams", "Additional query parameters");
  
      params.add("{${optParams.join(", ")}}");
  
  