TreeUtil { @NotNull public static Iterable<String> getMixinTypeNames(@NotNull Tree tree) { return TreeUtil.getNames(tree, JcrConstants.JCR_MIXINTYPES); } private  TreeUtil(); @Nullable static String getPrimaryTypeName(@NotNull Tree tree); @Nullable static String getPrimaryTypeName(@NotNull Tree tree, @NotNull LazyValue<Tree> readOnlyTree); @NotNull static Iterable<String> getMixinTypeNames(@NotNull Tree tree); @NotNull static Iterable<String> getMixinTypeNames(@NotNull Tree tree, @NotNull LazyValue<Tree> readOnlyTree); @Nullable static Iterable<String> getStrings(@NotNull Tree tree, @NotNull String propertyName); @Nullable static String getString(@NotNull Tree tree, @NotNull String propertyName); @Nullable static String getString(@NotNull Tree tree, @NotNull String name, @Nullable String defaultValue); static boolean getBoolean(@NotNull Tree tree, @NotNull String propertyName); @Nullable static String getName(@NotNull Tree tree, @NotNull String name); @NotNull static Iterable<String> getNames(@NotNull Tree tree, @NotNull String name); static long getLong(@NotNull Tree tree, @NotNull String name, long defaultValue); @Nullable static Tree getTree(@NotNull Tree tree, @NotNull String path); static Tree addChild(
            @NotNull Tree parent, @NotNull String name,
            @Nullable String typeName, @NotNull Tree typeRoot,
            @Nullable String userID); @NotNull static Tree addChild(@NotNull Tree tree, @NotNull String childName, @NotNull String primaryTypeName); @NotNull static Tree getOrAddChild(@NotNull Tree tree, @NotNull String childName, @NotNull String primaryTypeName); static void addMixin(@NotNull Tree tree, @NotNull String mixinName, @NotNull Tree typeRoot, @Nullable String userID); static void autoCreateItems(@NotNull Tree tree, @NotNull Tree type, @NotNull Tree typeRoot, @Nullable String userID); static PropertyState autoCreateProperty(@NotNull String name,
                                                   @NotNull Tree definition,
                                                   @Nullable String userID); static String getDefaultChildType(
            Tree typeRoot, Tree parent, String childName); static List<Tree> getEffectiveType(Tree tree, Tree typeRoot); static String findDefaultPrimaryType(Tree definitions, boolean sns); static boolean isNodeType(Tree tree, String typeName, Tree typeRoot); static boolean isReadOnlyTree(@NotNull Tree tree);  }
@Test public void testGetMixinTypeNamesNewTreeLazy() { Tree newTree = when(rootTree.getChild("x").getStatus()).thenReturn(Tree.Status.NEW).getMock(); assertTrue(Iterables.isEmpty(TreeUtil.getMixinTypeNames(newTree, new LazyValue<Tree>() { @Override protected Tree createValue() { throw new RuntimeException("should not get here"); } }))); }