docs: function() {
          return new OpenLayers.Geometry.Polygon([
              new OpenLayers.Geometry.LinearRing([
                  new OpenLayers.Geometry.Point(this.left, this.bottom),
                  new OpenLayers.Geometry.Point(this.right, this.bottom),
                  new OpenLayers.Geometry.Point(this.right, this.top),
                  new OpenLayers.Geometry.Point(this.left, this.top)
              ])
          ]);
      }