code: function(a, b) {
              var c = new google.maps.InfoWindow(a);
              this._call(b, c);
              return $(c);
          }
docs: Adds an InfoWindow to the map
  @param infoWindowOptions:google.maps.InfoWindowOptions (optional)
  @param callback:function(InfoWindow:google.maps.InfoWindowOptions) (optional)
  @return $(google.maps.InfoWindowOptions)
  @see http://code.google.com/intl/sv-SE/apis/maps/documentation/javascript/reference.html#InfoWindowOptions