Map.include({
  getRenderer: function (layer) {
    var renderer =
      layer.options.renderer ||
      this._getPaneRenderer(layer.options.pane) ||
      this.options.renderer ||
      this._renderer;

    if (!renderer) {
      renderer = this._renderer = this._createRenderer();
    }

    if (!this.hasLayer(renderer)) {
      this.addLayer(renderer);
    }

    return renderer;
  },
  _getPaneRenderer: function (name) {
    if (name === "overlayPane" || name == undefined) {
      return false;
    }

    var renderer = this._paneREnderers[name];
    if (renderer === undefined) {
      renderer = this._createRenderer({ pane: name });
      this._paneRenderers[name] = renderer;
    }
    return renderer;
  },
  _createRenderer: function (options) {
    return (this.options.preferCanvas && canvas(options)) || svg(options);
  },
});