docs: function(options, layer) {
          OpenLayers.Format.GML.prototype.initialize.apply(this, [options]);
          this.layer = layer;
          if (this.layer.featureNS) {
              this.featureNS = this.layer.featureNS;
          }    
          if (this.layer.options.geometry_column) {
              this.geometryName = this.layer.options.geometry_column;
          }
          if (this.layer.options.typename) {
              this.featureName = this.layer.options.typename;
          }
      }