JavaFX BarChart display image for elements on X-axis

Question

I'm trying to display icons on BarChart elements on the X-axis. I've yet to figure if this is even a supported feature. Picture of BarChart I'm trying to make:

In the example below, I tried passing the image in a Label to the chart. The code runs into an exception below. After many ways of trying to get this to work, I started doubting is this even possible?

JavaFX Application Thread java.lang.ClassCastException:
class javafx.scene.control.Label
cannot be cast to class java.lang.String

javafx.scene.control.Label is in module javafx.controls of loader app; java.lang.String is in module java.base of loader bootstrap.

private BarChart createBarChart() {
                
    Image img = new Image("file:src/images/icon.png");
    Label testLabel = new Label("Can this be empty?", new ImageView(img));
                            
    //Configuring category and NumberAxis   
    CategoryAxis xaxis= new CategoryAxis();  
    NumberAxis yaxis = new NumberAxis(0.1,2,0.1);  
    xaxis.setLabel("Volume");  
    yaxis.setLabel("Subject");  
      
    //Configuring BarChart   
    BarChart<Label,Float> bar = new BarChart(xaxis,yaxis);  
    bar.setTitle("Chart");  
      
    //Configuring Series for XY chart       
    Series<Label, Float> series = new XYChart.Series<>();           
    series.getData().add(new XYChart.Data(testLabel, 5));
      
    //Adding series to the barchart   
    bar.getData().add(series);  
    
    return bar;

}