VBox vbox = new VBox();
vbox.setPadding(new Insets(15));
vbox.setSpacing(15);
chooserClasses = new FileChooserList(this, "Compile and Runtime Classpath", config.getClassLocations());
chooserClasses.prefHeightProperty().bind(this.heightProperty().multiply(0.25));
vmLanguageList = new VMLanguageList("VM Languages", config);
vmLanguageList.prefHeightProperty().bind(this.heightProperty().multiply(0.25));