code: function(oDD, sGroup) {
              if (!this.initialized) { this.init(); }
              
              if (!this.ids[sGroup]) {
                  this.ids[sGroup] = {};
              }
              this.ids[sGroup][oDD.id] = oDD;
          }
docs: Each DragDrop instance must be registered with the DragDropMgr.
  This is executed in DragDrop.init()
  @method regDragDrop
  @param {DragDrop} oDD the DragDrop object to register
  @param {String} sGroup the name of the group this element belongs to
  @static