code: function (widget, msgArgs) {
          if (widget._context) {
              if (!msgArgs) {
                  msgArgs = [];
              }
              msgArgs.unshift("Template: " + widget._context.tplClasspath + ", Line: " + widget._lineNumber + "\n");
          }
          return msgArgs;
      }
docs: Add template and line number information to the msgArgs array to be used for logs functions. Return the modified
  array.
  @param {aria.widgetLibs.BaseWidget} widget widget instance
  @param {Array} msgArgs array
  @return {Array}
  @private