code: function(id) {
        var self = this;
  
        if (self._endTimers[id]) {
          // Clear the timeout or remove the ended listener.
          if (typeof self._endTimers[id] !== 'function') {
            clearTimeout(self._endTimers[id]);
          } else {
            var sound = self._soundById(id);
            if (sound && sound._node) {
              sound._node.removeEventListener('ended', self._endTimers[id], false);
            }
          }
  
          delete self._endTimers[id];
        }
  
        return self;
      }
docs: Clear the end timer for a sound playback.
  @param  {Number} id The sound ID.
  @return {Howl}