code: function(options) {
          // set state name mapping
          this.stateName = {};
          this.stateName[OpenLayers.State.INSERT] = "wfs:Insert";
          this.stateName[OpenLayers.State.UPDATE] = "wfs:Update";
          this.stateName[OpenLayers.State.DELETE] = "wfs:Delete";
          OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
      }
docs: Constructor: OpenLayers.Format.WFST.v1
  Instances of this class are not created directly.  Use the
  <OpenLayers.Format.WFST.v1_0_0> or <OpenLayers.Format.WFST.v1_1_0>
  constructor instead.
  
  Parameters:
  options - {Object} An optional object whose properties will be set on
  this instance.