code: function(a, b) {
              this.get('iw', new google.maps.InfoWindow).setOptions(a);
              this.get('iw').open(this.get('map'), this._unwrap(b)); 
          }
docs: Triggers an InfoWindow to open
  @param infoWindowOptions:google.maps.InfoWindowOptions
  @param marker:google.maps.Marker (optional)
  @see http://code.google.com/intl/sv-SE/apis/maps/documentation/javascript/reference.html#InfoWindowOptions