code: function( type ) {
                  var args, events, allEvents;
      
                  if ( !this._events || !type ) {
                      return this;
                  }
      
                  args = slice.call( arguments, 1 );
                  events = findHandlers( this._events, type );
                  allEvents = findHandlers( this._events, 'all' );
      
                  return triggerHanders( events, args ) &&
                          triggerHanders( allEvents, arguments );
              }
docs: 触发事件
  @method trigger
  @grammar trigger( name[, args...] ) => self
  @param  {String}   type     事件名
  @param  {*} [...] 任意参数
  @return {Boolean} 如果handler中return false了，则返回false, 否则返回true