code: function dispatchKeyEvent(keyCode, opt_modifiers) {
      var mod = opt_modifiers || {};
  
  
      angular.element(element).triggerHandler({
        type: 'keydown',
        keyCode: keyCode,
        which: keyCode,
        ctrlKey: mod.ctrl,
        altKey: mod.alt,
        metaKey: mod.meta,
        shortKey: mod.shift
      });
    }
docs: Dispatches a KeyboardEvent for the calendar.
  @param {number} keyCode
  @param {Object=} opt_modifiers