code: function(attribution) {
      this._checkLayer();
      // Remove old one
      this.map.attributionControl.removeAttribution(
        cdb.core.sanitize.html(this.options.attribution)
      );
      // Change text
      this.map.attributionControl.addAttribution(
        cdb.core.sanitize.html(attribution)
      );
      // Set new attribution in the options
      this.options.attribution = attribution;
      // Change in the layer
      this.tilejson.attribution = this.options.attribution;
  
      this.fire('updated');
    }
docs: Set a new layer attribution
  @params {String} New attribution string