code: function() {
              var DDM = YAHOO.util.DDM;
              if ( YAHOO.util.Event && document ) {
                  DDM._onLoad();
              } else {
                  if (DDM._timeoutCount > 2000) {
                      YAHOO.log("DragDrop requires the Event Utility", "error", "DragDropMgr");
                  } else {
                      setTimeout(DDM._addListeners, 10);
                      if (document && document.body) {
                          DDM._timeoutCount += 1;
                      }
                  }
              }
          }
docs: Trying to make the load order less important.  Without this we get
  an error if this file is loaded before the Event Utility.
  @method _addListeners
  @private
  @static