}

  /** Returns true if the element is protected. */
  public final boolean isProtected() {
    return Modifier.isProtected(getModifiers());
  }

  /** Returns true if the element is package-private. */
  public final boolean isPackagePrivate() {
    return !isPrivate() && !isPublic() && !isProtected();
  }

  /** Returns true if the element is private. */
  public final boolean isPrivate() {

        try {
            Constructor<ThreadDumpUtil> constructor = ThreadDumpUtil.class.getDeclaredConstructor();
            assertTrue("Constructor should be protected", java.lang.reflect.Modifier.isProtected(constructor.getModifiers()));

            // Test that constructor is accessible when made accessible
            constructor.setAccessible(true);
            ThreadDumpUtil instance = constructor.newInstance();

            if (field.getName().startsWith("ACCESS_CONTROL_")) {
                int modifiers = field.getModifiers();
                assertTrue("Field " + field.getName() + " should be protected", Modifier.isProtected(modifiers));
                assertTrue("Field " + field.getName() + " should be static", Modifier.isStatic(modifiers));
                assertTrue("Field " + field.getName() + " should be final", Modifier.isFinal(modifiers));

        return !Modifier.isPrivate(modifiers);
      }
    },

    PROTECTED {
      @Override
      boolean isVisible(int modifiers) {
        return Modifier.isPublic(modifiers) || Modifier.isProtected(modifiers);
      }
    },

    PUBLIC {
      @Override
      boolean isVisible(int modifiers) {
        return Modifier.isPublic(modifiers);
      }
    };