code: function() {
          var s = Y.merge(this.subscribers), a = Y.merge(this.afters), sib = this.sibling;
  
          if (sib) {
              Y.mix(s, sib.subscribers);
              Y.mix(a, sib.afters);
          }
  
          return [s, a];
      }
docs: Get all of the subscribers to this event and any sibling event
  @return {Array} first item is the on subscribers, second the after