### Question:
Nodes { public static void centerNode(final Node node, final Double marginSize) { AnchorPane.setTopAnchor(node, marginSize); AnchorPane.setBottomAnchor(node, marginSize); AnchorPane.setLeftAnchor(node, marginSize); AnchorPane.setRightAnchor(node, marginSize); } 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 centerNode() { Nodes.centerNode(this.testButton, MARGIN); }