if (node2.metadata == null) {
                return metadata == null;
            }

            return metadata != null && metadata.toString().equals(node2.metadata.toString());
        } else {
            return super.equals(obj);
        }
    }

    @Override
    public int hashCode() {
        if (metadata == null) {
            return super.hashCode();
        }

        return metadata.toString().hashCode();

  }

  @Override
  public boolean equals(@CheckForNull Object object) {
    if (object == this) {
      return true;
    }
    if (object instanceof ByFunctionOrdering) {
      ByFunctionOrdering<?, ?> that = (ByFunctionOrdering<?, ?>) object;
      return this.function.equals(that.function) && this.ordering.equals(that.ordering);
    }
    return false;
  }

  @Override

     * {@link org.codelibs.core.lang.ObjectUtil#equals(java.lang.Object, java.lang.Object)}
     * .
     */
    @Test
    public void testEqualsObjectObject() {
        assertThat(ObjectUtil.equals(null, null), is(true));
        assertThat(ObjectUtil.equals(null, ""), is(false));
        assertThat(ObjectUtil.equals("", null), is(false));
        assertThat(ObjectUtil.equals("", ""), is(true));

    }

    @Test
    void testEqualsNullSafe() {
        assertFalse(new Organization().equals(null));

        new Organization().equals(new Organization());
    }

    @Test
    void testEqualsIdentity() {
        Organization thing = new Organization();
        assertTrue(thing.equals(thing));
    }

    @Test
    void testToStringNullSafe() {

    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        AbstractLanguageElement that = (AbstractLanguageElement) o;
        return Objects.equals(rawCommentText, that.rawCommentText) &&
            Objects.equals(annotationNames, that.annotationNames);
    }

          e,
          equalObject1
              + " [group 1, item 1] must be Object#equals to "
              + notEqualObject1
              + " [group 1, item 2]");
      return;
    }
    fail("Should get not equal to equal object error");
  }

  /**
   * Test EqualsTester with no equals or not equals objects. This checks proper handling of null,
   * incompatible class and reflexive tests
   */

    // setToTest should throw when it calls equals(), or equals is called on it, except for itself
    assertThat(setToTest).isEqualTo(setToTest);
    assertThrows(IllegalStateException.class, () -> setToTest.equals(wrappedSet));
    assertThrows(IllegalStateException.class, () -> setToTest.equals(copyOfWrappedSet));
    assertThrows(IllegalStateException.class, () -> setToTest.equals(copyOfModifiedSet));

            while (resources.hasMoreElements()) {
                final URL resource = resources.nextElement();
                logger.debug("loading {}", resource);
                if ("file".equals(resource.getProtocol())) {
                    final File directory = new File(resource.getFile());
                    if (directory.exists() && directory.isDirectory()) {

        assertTrue(synonymItem1.equals(synonymItem1));
        assertTrue(synonymItem1.equals(new SynonymItem(1, new String[] { "A", "a" }, new String[] { "B", "b" })));
        assertTrue(synonymItem1.equals(new SynonymItem(2, new String[] { "A", "a" }, new String[] { "B", "b" })));
        assertFalse(synonymItem1.equals(new SynonymItem(2, new String[] { "A", "a" }, new String[] { "B", })));

              @Override
              public int hashCode() {
                return map.hashCode();
              }

              @Override
              public boolean equals(@Nullable Object o) {
                return map.equals(o);
              }

              @Override
              public String toString() {
                return map.toString();
              }

              @Override