code: function(layer, style, version) {
      if(version === undefined) {
        version = style;
        style = layer;
        layer = 0;
      }
  
      version = version || cartodb.CARTOCSS_DEFAULT_VERSION;
  
      this.layers[layer].options.cartocss = style;
      this.layers[layer].options.cartocss_version = version;
      this._definitionUpdated();
    }
docs: Change style of the tiles
  @params {style} New carto for the tiles