docs: function(options) {
          options = OpenLayers.Util.applyDefaults({
              sphericalMercator: true
          }, options);
          var name = options.name || "Bing " + (options.type || this.type);
          
          var newArgs = [name, null, options];
          OpenLayers.Layer.XYZ.prototype.initialize.apply(this, newArgs);
          this.tileOptions = OpenLayers.Util.extend({
              crossOriginKeyword: 'anonymous'
          }, this.options.tileOptions);
          this.loadMetadata(); 
      }