code: function() {
        var self = this;
        var touchlist = [];
  
        // we can use forEach since pointerEvents only is in IE10
        Object.keys(self.pointers).sort().forEach(function(id) {
          touchlist.push(self.pointers[id]);
        });
        return touchlist;
      }
docs: get a list of pointers
  @returns {Array}     touchlist