docs: function(control, callbacks, options) {
          OpenLayers.Util.extend(this, options);
          this.control = control;
          this.callbacks = callbacks;
  
          var map = this.map || control.map;
          if (map) {
              this.setMap(map); 
          }
          
          this.id = OpenLayers.Util.createUniqueID(this.CLASS_NAME + "_");
      }