### Question:
CaseManagementCommandUtil { public static boolean isStage(final Node<View<?>, Edge> parent, final Node<View<?>, Edge> child) { return !Objects.isNull(parent.getContent()) && parent.getContent().getDefinition() instanceof CaseManagementDiagram && isStageNode(child); }  @SuppressWarnings("unchecked") static Node<Definition<CaseManagementDiagram>, ?> getFirstDiagramNode(final Graph<?, Node> graph); @SuppressWarnings("unchecked") static int getChildGraphIndex(final Node parent,
                                         final Node child); @SuppressWarnings("unchecked") static int getChildCanvasIndex(final Node<View<?>, Edge> parent,
                                          final Node<View<?>, Edge> child); static boolean isStage(final Node<View<?>, Edge> parent, final Node<View<?>, Edge> child); static boolean isStageNode(final Node<View<?>, Edge> node); static boolean isSubStageNode(final Node<View<?>, Edge> node); static Predicate<Edge> childPredicate(); static Predicate<Edge> sequencePredicate(); @SuppressWarnings("unchecked") static int getNewChildCanvasIndex(final Node<View<?>, Edge> parent); @SuppressWarnings("unchecked") static int getNewChildGraphIndex(final Node<View<?>, Edge> parent);  }### Answer:
@Test public void testIsStage_withStage() { setupForStage(); assertTrue(CaseManagementCommandUtil.isStage(parent, child)); }
@Test public void testIsStage_withSubStage() { setupForSubStage(); assertFalse(CaseManagementCommandUtil.isStage(parent, child)); }