code: function(options) {
          var node = this.writeNode("wcs:GetCoverage", options);
          this.setAttributeNS(
              node, this.namespaces.xsi,
              "xsi:schemaLocation", this.schemaLocation
          );
          return OpenLayers.Format.XML.prototype.write.apply(this, [node]);
      }
docs: Constructor: OpenLayers.Format.WCSGetCoverage
  
  Parameters:
  options - {Object} An optional object whose properties will be set on
  this instance.
   
  Method: write
  
  Parameters:
  options - {Object} Optional object.
  
  Returns:
  {String} A WCS GetCoverage request XML string.