docs: function (p) {
              var src = ariaWidgetsFormDropDownListTrait.prototype;
              for (var key in src) {
                  if (src.hasOwnProperty(key) && !p.hasOwnProperty(key)) {
                      // copy methods which are not already on this object (this avoids copying $classpath and
                      // $destructor)
                      p[key] = src[key];
                  }
              }
          }