### Question:
NodeRef implements Bounded, Comparable<NodeRef> { public static @Nullable String nodeFromPath(@Nullable String fullPath) { if (fullPath == null || fullPath.isEmpty()) { return null; } int idx = fullPath.lastIndexOf(PATH_SEPARATOR); if (idx == -1) { return fullPath; } return fullPath.substring(idx + 1, fullPath.length()); } NodeRef(@NonNull Node node, String parentPath, @NonNull ObjectId metadataId); NodeRef update(final ObjectId newId, final @Nullable Envelope newBounds); static NodeRef createRoot(Node node); static NodeRef create(String parentPath, Node node); static NodeRef create(String parentPath, Node node, ObjectId metadataId); String getParentPath(); Node getNode(); String path(); String name(); @Override ObjectId getObjectId(); ObjectId getMetadataId(); ObjectId getDefaultMetadataId(); RevObject.TYPE getType(); @Override boolean equals(Object o); @Override int hashCode(); @Override int compareTo(NodeRef o); @Override String toString(); static @Nullable String parentPath(@Nullable String fullPath); static void checkValidPath(final String path); static @Nullable String nodeFromPath(@Nullable String fullPath); static boolean isDirectChild(@NonNull String parentPath, @NonNull String nodePath); static boolean isChild(@NonNull String parentPath, @NonNull String nodePath); static List<String> allPathsTo(final @NonNull String path); static List<String> split(final @NonNull String path); static String appendChild(String parentTreePath, @NonNull String childName); @Override boolean intersects(Envelope env); @Override void expand(Envelope env); static int depth(String path); static String removeParent(final String parentPath, final String childPath); @Override Optional<Envelope> bounds(); static NodeRef tree(@NonNull String treePath, @NonNull ObjectId id,
            @NonNull ObjectId metadataId); static final String ROOT; static final char PATH_SEPARATOR; }### Answer:
@Test public void testNodeFromPath() { String node = NodeRef.nodeFromPath("Points/Points.1"); assertEquals(node, "Points.1"); node = NodeRef.nodeFromPath("refs/heads/master"); assertEquals(node, "master"); node = NodeRef.nodeFromPath("Points.1"); assertEquals(node, "Points.1"); node = NodeRef.nodeFromPath(""); assertNull(node); node = NodeRef.nodeFromPath(null); assertNull(node); }