JavaFX / Howto embed map in SplitPane - javafx-2

Question

today's question is about embedding a map view into a JavaFX application. I basically followed the instructions on StackOverFlow - embedding google map in JavaFX and Embed OpenLayers with OpenStreetMap, so everything like the *.html file is in place. But there, people are adding the WebView to main Scene. For me, I would like to add the WebView to a SplitPane. ThereFore I prepared the application.fxml file as followed:
<SplitPane id="SplitPane" dividerPositions="0.5" orientation="HORIZONTAL" prefHeight="260.0" prefWidth="850.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<items>
<TableView id="tableView1" fx:id="table" prefHeight="263.0" prefWidth="433.0">
<columns>
<TableColumn text="one" /><TableColumn text="two" /><TableColumn text="three" />
</columns>
</TableView>
<AnchorPane prefHeight="200.0" prefWidth="200.0">
<children>
<Region fx:id="webViewRegion" prefHeight="200.0" prefWidth="200.0" />
</children>
</AnchorPane>
</items>
</SplitPane>
The FXML file is loaded by the FXMLLoader when the application is started. In the application controller I get the Region as followed:
#FXML
private Region webViewRegion;
class MyMapView extends Region {
HBox toolbar;
WebView webview = new WebView();
WebEngine webEngine = webview.getEngine();
public MyMapView() {
final URL urlGoogleMaps = getClass().getResource("openstreetmap.html");
webEngine.load(urlGoogleMaps.toExternalForm());
getChildren().add(webview);
}
}
private void load_webView() {
webViewRegion = new MyMapView();
}
For me, now I do not exactly know how to populate the Region with the Webview in a correct way or if there is any better approach?