Handler testHandler = new Handler(null);

            // When
            Method method = Handler.class.getDeclaredMethod("getDefaultPort");

            // Then
            assertTrue(Modifier.isProtected(method.getModifiers()));
            method.setAccessible(true); // Required to invoke protected method
            assertEquals(443, method.invoke(testHandler));
        }

        @Test

  }

  /** 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();

            assertNotNull("processWebInfLib method should exist", method);
            assertTrue("processWebInfLib should be protected", java.lang.reflect.Modifier.isProtected(method.getModifiers()));
        } catch (final NoSuchMethodException e) {
            fail("processWebInfLib method should exist");
        }
    }

    public void test_packageStructure() {

            Handler testHandler = new Handler();

            // When
            Method method = Handler.class.getDeclaredMethod("getDefaultPort");

            // Then
            assertTrue(Modifier.isProtected(method.getModifiers()));
            method.setAccessible(true);
            assertEquals(443, method.invoke(testHandler));
        }

        @Test
        @DisplayName("Should maintain inheritance hierarchy")

            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);
      }
    };