public static PathSpecSet empty()
  {
    return EMPTY;
  }
@Test
  public void testEmpty() {
    PathSpecSet pathSpecSet = PathSpecSet.empty();
    Assert.assertEquals(pathSpecSet.getPathSpecs(), Collections.emptySet());
    Assert.assertFalse(pathSpecSet.isAllInclusive());
    Assert.assertTrue(pathSpecSet.isEmpty());
    Assert.assertEquals(pathSpecSet.toArray(), new PathSpec[0]);
  }