}
    }

    public static void putInts(Hasher hasher, int[] array) {
        hasher.putInt(array.length);
        for (int i : array) {
            hasher.putInt(i);
        }
    }

    public static void putShorts(Hasher hasher, short[] array) {
        hasher.putInt(array.length);
        for (short s : array) {
            hasher.putInt(s);
        }
    }

        public void putHash(HashCode hashCode) {
            hasher.putInt(hashCode.length());
            hasher.putHash(hashCode);
        }

        @Override
        public void putInt(int value) {
            hasher.putInt(4);
            hasher.putInt(value);
        }

        @Override
        public void putLong(long value) {
            hasher.putInt(8);
            hasher.putLong(value);
        }

        hasher.putInt(1)
        hasher.hash()

        when:
        hasher.hash()

        then:
        thrown(IllegalStateException)
    }

    def 'hashers can overlap'() {
        when:
        def hasher1 = Hashing.newHasher()
        hasher1.putInt(1)

        and:
        def hasher2 = Hashing.newHasher()
        hasher2.putInt(1)

            cacheHasher.putString(implementation.getName());
            cacheHasher.putInt(metadataResources.size());
            for (ResourcePattern ivyPattern : metadataResources) {
                cacheHasher.putString(ivyPattern.getPattern());
            }
            cacheHasher.putInt(artifactResources.size());
            for (ResourcePattern artifactPattern : artifactResources) {

  Hasher putBytes(ByteBuffer bytes);

  @CanIgnoreReturnValue
  @Override
  Hasher putShort(short s);

  @CanIgnoreReturnValue
  @Override
  Hasher putInt(int i);

  @CanIgnoreReturnValue
  @Override
  Hasher putLong(long l);

  /** Equivalent to {@code putInt(Float.floatToRawIntBits(f))}. */
  @CanIgnoreReturnValue
  @Override
  Hasher putFloat(float f);

  Hasher putBytes(ByteBuffer bytes);

  @CanIgnoreReturnValue
  @Override
  Hasher putShort(short s);

  @CanIgnoreReturnValue
  @Override
  Hasher putInt(int i);

  @CanIgnoreReturnValue
  @Override
  Hasher putLong(long l);

  /** Equivalent to {@code putInt(Float.floatToRawIntBits(f))}. */
  @CanIgnoreReturnValue
  @Override
  Hasher putFloat(float f);

        for (Hasher hasher : hashers) {
          hasher.putShort(s);
        }
        return this;
      }

      @Override
      public Hasher putInt(int i) {
        for (Hasher hasher : hashers) {
          hasher.putInt(i);
        }
        return this;
      }

      @Override
      public Hasher putLong(long l) {
        for (Hasher hasher : hashers) {

  @CanIgnoreReturnValue
  public final Hasher putDouble(double d) {
    return putLong(Double.doubleToRawLongBits(d));
  }

  @Override
  @CanIgnoreReturnValue
  public final Hasher putFloat(float f) {
    return putInt(Float.floatToRawIntBits(f));
  }

  @Override
  @CanIgnoreReturnValue
  public Hasher putUnencodedChars(CharSequence charSequence) {
    for (int i = 0, len = charSequence.length(); i < len; i++) {

  @CanIgnoreReturnValue
  public Hasher putShort(short s) {
    scratch.putShort(s);
    return update(Shorts.BYTES);
  }

  @Override
  @CanIgnoreReturnValue
  public Hasher putInt(int i) {
    scratch.putInt(i);
    return update(Ints.BYTES);
  }

  @Override
  @CanIgnoreReturnValue
  public Hasher putLong(long l) {
    scratch.putLong(l);
    return update(Longs.BYTES);
  }

    }

    public ImmutableList<MapEntrySnapshot<T>> getEntries() {
        return entries;
    }

    @Override
    public void appendToHasher(Hasher hasher) {
        hasher.putString("Map");
        hasher.putInt(entries.size());
        for (MapEntrySnapshot<T> entry : entries) {
            entry.getKey().appendToHasher(hasher);
            entry.getValue().appendToHasher(hasher);
        }
    }

    @Override