code: function runHandlers(handlerEvent, event) {
      var handler;
      for (var name in HANDLERS) {
        handler = HANDLERS[name];
        if (handler instanceof $$MdGestureHandler) {
  
          if (handlerEvent === 'start') {
            // Run cancel to reset any handlers' state
            handler.cancel();
          }
          handler[handlerEvent](event, pointer);
  
        }
      }
    }
docs: /*
  When a DOM event happens, run all registered gesture handlers' lifecycle
  methods which match the DOM event.
  Eg when a 'touchstart' event happens, runHandlers('start') will call and
  run `handler.cancel()` and `handler.start()` on all registered handlers.