code: function(e) {
              Y.each(_wrappers, function(v, k) {
                  v.detachAll();
                  remove(v.el, v.type, v.fn, v.capture);
                  delete _wrappers[k];
                  delete _el_events[v.domkey][k];
              });
          }
docs: Removes all listeners registered by pe.event.  Called
  automatically during the unload event.
  @method _unload
  @static
  @private