code: function (dt) {
              if (this.isAnimated) {
                  var result = false;
                  for (var i = 0; i < this.animatedTilesets.length; i++) {
                      result = this.animatedTilesets[i].update(dt) || result;
                  }
                  return result;
              }
  
              return false;
          }
docs: update animations in a tileset layer
  @ignore