code: function trigger(name, arg1, arg2, arg3, arg4) {
              // Common arguments for events
              switch (name) {
                  case 'active':
                      arg2 = arg1;
                      arg1 = $items;
                      break;
  
                  case 'activePage':
                      arg2 = arg1;
                      arg1 = pages;
                      break;
  
                  default:
                      arg4 = arg1;
                      arg1 = pos;
                      arg2 = $items;
                      arg3 = rel;
              }
  
              if (callbacks[name]) {
                  for (var i = 0, l = callbacks[name].length; i < l; i++) {
                      callbacks[name][i].call(frame, arg1, arg2, arg3, arg4);
                  }
              }
  
              if (o.domEvents && !parallax) {
                  $frame.trigger(pluginName + ':' + name, [arg1, arg2, arg3, arg4]);
              }
          }
docs: Trigger callbacks for event.
  
  @param  {String} name Event name.
  @param  {Mixed}  argX Arguments passed to callback.
  
  @return {Void}