Util { static boolean isEmpty(final String value) { return value == null || value.isEmpty(); } private  Util(); static Session wrapSessionReadOnly(final Session session); static List<String> getManifestHeaderValues(final Manifest manifest, final String headerName); static String escapeManifestHeaderValue(final @NotNull String... values); static String escapeManifestHeaderValues(final @NotNull List<String> values); static List<URL> resolveManifestResources(final URL manifestUrl, final List<String> resources); static Map<URL, List<URL>> mapManifestHeaderResources(final String headerName, final ClassLoader classLoader); static Map<URL, List<URL>> mapManifestHeaderResources(final String headerName, final List<File> files); static Map<URL, List<URL>> mapManifestHeaderResources(final String headerName, final URL manifestUrl); static Predicate<T> debugFilter(final Logger logger, final String format); static Predicate<T> traceFilter(final Logger logger, final String format); @Deprecated static Function<T, M> composeTry(final Function<R, M> monadUnit,
                                                      final Supplier<M> monadZero,
                                                      final TryFunction<T, R> onElement,
                                                      final BiConsumer<T, Exception> onError); @Deprecated static Function<T, Optional<R>> optFunc(final Function<T, R> inputFunc); @Deprecated static Function<T, R> compose(final Function<T, I> before, final Function<I, R> after);  }
@Test public void testIsEmpty() { assertTrue("empty string is empty", Util.isEmpty("")); assertFalse("empty string is empty", Util.isEmpty("full")); }