public static boolean isLog4jLogger(Class<?> clazz) {
    if (clazz == null) {
      return false;
    }
    return isLog4jLogger(clazz.getName());
  }
@Test
  public void testIsLog4jLogger() throws Exception {
    assertFalse("False if clazz is null", GenericsUtil.isLog4jLogger((Class<?>) null));
    assertTrue("The implementation is Log4j",
        GenericsUtil.isLog4jLogger(TestGenericsUtil.class));
  }