* java.util.HashMap class.
   */
  // Copied from java/com/google/common/collect/Hashing.java
  private static int smear(int hashCode) {
    hashCode ^= (hashCode >>> 20) ^ (hashCode >>> 12);
    return hashCode ^ (hashCode >>> 7) ^ (hashCode >>> 4);
  }

  private static final class PaddedLock extends ReentrantLock {
    /*

                  return runnable.equals(that.runnable);
                }
                return false;
              }

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

  public void testFailsToForwardEquals() {
    tester.includingEquals();
    assertFailure(

    try {
      SerializableTester.reserializeAndAssert(orig);
      errorNotThrown = true;
    } catch (AssertionFailedError error) {
      // expected
      assertContains("must be equal to the Object#hashCode", error.getMessage());
    }
    assertFalse(errorNotThrown);
  }

  public void testObjectWhichIsEqualButChangesClass() {
    ObjectWhichIsEqualButChangesClass orig = new ObjectWhichIsEqualButChangesClass();

    hasher.putBytes(bytes, off, len);
    out.write(bytes, off, len);
  }

  /**
   * Returns the {@link HashCode} based on the data written to this stream. The result is
   * unspecified if this method is called more than once on the same instance.
   */
  public HashCode hash() {
    return hasher.hash();
  }

  // Overriding close() because FilterOutputStream's close() method pre-JDK8 has bad behavior:

  }

  @Override
  public boolean equals(@Nullable Object object) {
    return object == this || delegate().equals(object);
  }

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

  /**
   * A sensible default implementation of {@link #add(Object)}, in terms of {@link #add(int,
   * Object)}. If you override {@link #add(int, Object)}, you may wish to override {@link

   * unspecified if this method is called more than once on the same instance.
   */
  HashCode hash();

  /**
   * {@inheritDoc}
   *
   * @deprecated This returns {@link Object#hashCode()}; you almost certainly mean to call {@code
   *     hash().asInt()}.
   */
  @Override
  @Deprecated
  int hashCode();

      Murmur3_128HashFunction other = (Murmur3_128HashFunction) object;
      return seed == other.seed;
    }
    return false;
  }

  @Override
  public int hashCode() {
    return getClass().hashCode() ^ seed;
  }

  private static final class Murmur3_128Hasher extends AbstractStreamingHasher {
    private static final int CHUNK_SIZE = 16;
    private static final long C1 = 0x87c37b91114253d5L;

                this.options);
    }

    /**
     * {@inheritDoc}
     *
     * @see java.lang.Object#hashCode()
     */
    @Override
    public int hashCode() {
        if (this.fileId != null) {
            return (int) (Arrays.hashCode(this.fileId) + 3 * this.tree_num);
        }
        return (int) (this.fid + 3 * this.tree_num);
    }

    /**
     * {@inheritDoc}

                             * augment the addresses name's hashCode to distinguish those resolved by
                             * Lmhosts, WINS, or BCAST. Otherwise a failed query from say WINS would
                             * get pulled out of the cache for a BCAST on the same name.
                             */
                            response.addrEntry[0].hostName.srcHashCode = request.addr.hashCode();

   */
  public final <S extends @Nullable T> Wrapper<S> wrap(@ParametricNullness S reference) {
    return new Wrapper<>(this, reference);
  }

  /**
   * Wraps an object so that {@link #equals(Object)} and {@link #hashCode()} delegate to an {@link
   * Equivalence}.
   *
   * <p>For example, given an {@link Equivalence} for {@link String strings} named {@code equiv}
   * that tests equivalence using their lengths:
   *