assertEquals(Sets.newTreeSet(asList("a", "b", "c")), set);
    assertFalse(set.equals(Sets.newTreeSet(asList("a", "b", "d"))));
    assertFalse(Sets.newTreeSet(asList("a", "b", "d")).equals(set));
    assertFalse(set.equals(newHashSet(4, 5, 6)));
    assertFalse(newHashSet(4, 5, 6).equals(set));
  }

  public void testEquals_bothExplicitOrdering() {
    SortedSet<String> set = of("in", "the", "a");

    }
  }

  static class SlowElement extends Element {
    SlowElement(int hash) {
      super(hash);
    }

    @Override
    public boolean equals(@Nullable Object obj) {
      return slowItDown() != 1 && super.equals(obj);
    }

    @Override
    public int hashCode() {
      return slowItDown() + hash;
    }

    @Override
    public int compareTo(Element e) {

     * Two instances are considered equal if their {@link #leftValue()} values are equal and their
     * {@link #rightValue()} values are also equal.
     */
    @Override
    boolean equals(@CheckForNull Object other);

    /**
     * The hash code equals the value {@code Arrays.asList(leftValue(), rightValue()).hashCode()}.
     */
    @Override
    int hashCode();
  }

    protected String doBackward(T enumValue) {
      return enumValue.name();
    }

    @Override
    public boolean equals(@CheckForNull Object object) {
      if (object instanceof StringConverter) {
        StringConverter<?> that = (StringConverter<?>) object;
        return this.enumClass.equals(that.enumClass);
      }
      return false;
    }

    @Override
    public int hashCode() {

        AuthScheme authScheme = null;
        if (Constants.BASIC.equals(scheme)) {
            authScheme = new BasicScheme();
        } else if (Constants.DIGEST.equals(scheme)) {
            authScheme = new DigestScheme();
        } else if (Constants.NTLM.equals(scheme)) {
            final Properties props = new Properties();

    }

    public void test_equals() {

        PrunedTag prunedtag = new PrunedTag("tag");

        assertTrue(prunedtag.equals(prunedtag));
        assertEquals(false, prunedtag.equals(null));
        assertEquals(false, prunedtag.equals(""));

    }

    public void test_toString() {
        String tag = "tag", id = "id", css = "css", attrName = "attrName", attrValue = "attrValue";

    }


    /*
     * (non-Javadoc)
     * 
     * @see java.lang.Object#equals(java.lang.Object)
     */
    @Override
    public boolean equals ( Object other ) {

        if ( other instanceof MIEName ) {
            MIEName terg = (MIEName) other;
            if ( Objects.equals(this.oid, terg.oid)

              return endOfData();
            }
          };
        }
      };
    }

    @Override
    public boolean equals(@CheckForNull Object o) {
      if (o instanceof RangeMap) {
        RangeMap<?, ?> rangeMap = (RangeMap<?, ?>) o;
        return asMapOfRanges().equals(rangeMap.asMapOfRanges());
      }
      return false;
    }

    @Override
    public int hashCode() {

   * required, to have the following properties:
   *
   * <ul>
   *   <li>Its execution does not cause any observable side effects.
   *   <li>The computation is <i>consistent with equals</i>; that is, {@link Objects#equal
   *       Objects.equal}{@code (a, b)} implies that {@code predicate.apply(a) ==
   *       predicate.apply(b))}.
   * </ul>
   *

   */
  protected boolean standardIsEmpty() {
    return !entrySet().iterator().hasNext();
  }

  /**
   * A sensible definition of {@link #equals} in terms of the {@code equals} method of {@link
   * #entrySet}. If you override {@link #entrySet}, you may wish to override {@link #equals} to
   * forward to this implementation.
   *
   * @since 7.0
   */
  protected boolean standardEquals(@CheckForNull Object object) {