如何在使用GMapsFX和FXML时初始化Google Maps API key？

import com.lynden.gmapsfx.GoogleMapView;
import com.lynden.gmapsfx.MapComponentInitializedListener;
import com.lynden.gmapsfx.javascript.object.GoogleMap;
import com.lynden.gmapsfx.javascript.object.MapOptions;
import com.lynden.gmapsfx.javascript.object.Marker;
import com.lynden.gmapsfx.javascript.object.MarkerOptions;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;

import java.net.URL;
import java.util.ResourceBundle;

public class MapController implements Initializable, MapComponentInitializedListener {

    @FXML
    private GoogleMapView mapView;

    private GoogleMap map;

    @Override
    public void initialize(URL location, ResourceBundle resources) {
        mapView.addMapInializedListener(this);
    }

    @Override
    public void mapInitialized() {
        MapOptions options = new MapOptions();
        options.center(new LatLong(37.7749, -122.4194))
                .zoom(12)
                .mapType(MapTypeIdEnum.ROADMAP);

        map = mapView.createMap(options);

        MarkerOptions markerOptions = new MarkerOptions();
        markerOptions.position(new LatLong(37.7749, -122.4194))
                .visible(Boolean.TRUE)
                .title("My Marker");

        Marker marker = new Marker(markerOptions);

        map.addMarker(marker);
    }
}

mapView.setApiKey("YOUR_API_KEY");