return delegate.getId();
    }

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

  private interface Equals {
    @Override
    boolean equals(@Nullable Object obj);

    @Override
    int hashCode();

    @Override
    String toString();
  }

  private static class NoDelegateToEquals implements Equals {

    HashCode hash2 = HashCode.fromString(hash1.toString());
    assertEquals(hash1, hash2);
  }

  public void testRoundTrip() {
    for (ExpectedHashCode expected : expectedHashCodes) {
      String string = HashCode.fromBytes(expected.bytes).toString();
      assertEquals(expected.toString, string);
      assertEquals(
          expected.toString,

  private final int bits;
  private final String toString;

  ChecksumHashFunction(
      ImmutableSupplier<? extends Checksum> checksumSupplier, int bits, String toString) {
    this.checksumSupplier = checkNotNull(checksumSupplier);
    checkArgument(bits == 32 || bits == 64, "bits (%s) must be either 32 or 64", bits);
    this.bits = bits;
    this.toString = checkNotNull(toString);
  }

  @Override
  public int bits() {

      return sequence.toString();
    }

    @Override
    public String replaceFrom(CharSequence sequence, char replacement) {
      return sequence.toString();
    }

    @Override
    public String replaceFrom(CharSequence sequence, CharSequence replacement) {
      checkNotNull(replacement);
      return sequence.toString();
    }

    @Override

@GwtCompatible
@ElementTypesAreNonnullByDefault
public final class Functions {
  private Functions() {}

  /**
   * A function equivalent to the method reference {@code Object::toString}, for users not yet using
   * Java 8. The function simply invokes {@code toString} on its argument and returns the result. It
   * throws a {@link NullPointerException} on null input.
   *

    for (int i = 0; i < numInsertions * 2; i += 2) {
      bf.put(Integer.toString(i));
    }
    assertApproximateElementCountGuess(bf, numInsertions);

    // Assert that the BF "might" have all of the even numbers.
    for (int i = 0; i < numInsertions * 2; i += 2) {
      assertTrue(bf.mightContain(Integer.toString(i)));
    }

    // Now we check for known false positives using a set of known false positives.

  }

  public void testToString() {
    assertEquals("foo", entry("foo", 1).toString());
    assertEquals("bar x 2", entry("bar", 2).toString());
  }

  public void testToStringNull() {
    assertEquals("null", entry(NE, 1).toString());
    assertEquals("null x 2", entry(NE, 2).toString());
  }

  public void testEquals() {
    assertEquals(control("foo", 1), entry("foo", 1));

    assertSame(m1, m1.precomputed());
    assertEquals(m1.toString(), m1.precomputed().toString());

    CharMatcher m2 = anyOf("Az");
    assertSame(m2, m2.precomputed());
    assertEquals(m2.toString(), m2.precomputed().toString());

    CharMatcher m3 = inRange('A', 'Z');
    assertSame(m3, m3.precomputed());
    assertEquals(m3.toString(), m3.precomputed().toString());

    assertSame(m1, m1.precomputed());
    assertEquals(m1.toString(), m1.precomputed().toString());

    CharMatcher m2 = anyOf("Az");
    assertSame(m2, m2.precomputed());
    assertEquals(m2.toString(), m2.precomputed().toString());

    CharMatcher m3 = inRange('A', 'Z');
    assertSame(m3, m3.precomputed());
    assertEquals(m3.toString(), m3.precomputed().toString());

    }

    @Override
    public String toString() {
      return name;
    }
  }

  private static final class EqualsBasedOnToString {
    private final String s;

    private EqualsBasedOnToString(String s) {
      this.s = s;
    }

    @Override
    public boolean equals(@Nullable Object obj) {
      return obj != null && obj.toString().equals(toString());
    }

    @Override