### Question:
Nodes { public static void hideAndResizeParentIf( final Node node, final ObservableValue<? extends Boolean> condition ) { autoresizeContainerOn(node, condition); bindContentBiasCalculationTo(node, condition); } private  Nodes(); static void centerNode(final Node node, final Double marginSize); static void hideAndResizeParentIf(
        final Node node,
        final ObservableValue<? extends Boolean> condition
    ); static void autoresizeContainerOn(
        final Node node,
        final ObservableValue<?> observableValue
    ); static void bindContentBiasCalculationTo(
        final Node node,
        final ObservableValue<? extends Boolean> observableValue
    );  }### Answer:
@Test public void testAutosizeHelpers() { final BooleanProperty shouldDisplay = new SimpleBooleanProperty(true); final Button testButton = new Button(); Nodes.hideAndResizeParentIf(testButton, shouldDisplay); assertThat(testButton.isManaged()).isTrue(); assertThat(testButton.isVisible()).isTrue(); shouldDisplay.setValue(false); assertThat(testButton.isManaged()).isFalse(); assertThat(testButton.isVisible()).isFalse(); }