* 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 class PaddedLock extends ReentrantLock {
    /*

  }

  @Override
  public boolean equals(@CheckForNull 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

public class BaseComparable implements Comparable<BaseComparable>, Serializable {
  private final String s;

  public BaseComparable(String s) {
    this.s = s;
  }

  @Override
  public int hashCode() { // delegate to 's'
    return s.hashCode();
  }

  @Override
  public boolean equals(@Nullable Object other) {
    if (other == null) {
      return false;
    } else if (other instanceof BaseComparable) {

            assertEquals(v1, v2, "expected " + v1 + " == " + v2);
            assertEquals(v2, v1, "expected " + v2 + " == " + v1);
            assertEquals(v1.hashCode(), v2.hashCode(), "expected #(" + v1 + ") == #(" + v1 + ")");
        }
    }

    protected void assertSequence(String... versions) {
        for (int i = 0; i < versions.length - 1; i++) {

        return srcIndex - start;
    }


    @Override
    public int hashCode () {
        int result;

        result = this.name.hashCode();
        result += 65599 * this.hexCode;
        result += 65599 * this.srcHashCode; /*
                                             * hashCode is different depending
                                             * on where it came from

      ComparatorOrdering<?> that = (ComparatorOrdering<?>) object;
      return this.comparator.equals(that.comparator);
    }
    return false;
  }

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

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

  private static final long serialVersionUID = 0;

    for (HashCode hashCode : hashCodes) {
      byte[] nextBytes = hashCode.asBytes();
      checkArgument(
          nextBytes.length == resultBytes.length, "All hashcodes must have the same bit length.");
      for (int i = 0; i < nextBytes.length; i++) {
        resultBytes[i] = (byte) (resultBytes[i] * 37 ^ nextBytes[i]);
      }
    }
    return HashCode.fromBytesNoCopy(resultBytes);
  }

            return false;
        }

        id = artifact.getGroupId() + ':' + id;

        return !excludes.contains(id);
    }

    @Override
    public int hashCode() {
        int hash = 17;
        hash = hash * 31 + excludes.hashCode();
        return hash;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }

      return function.equals(that.function) && resultEquivalence.equals(that.resultEquivalence);
    }
    return false;
  }

  @Override
  public int hashCode() {
    return Objects.hashCode(function, resultEquivalence);
  }

  @Override
  public String toString() {
    return resultEquivalence + ".onResultOf(" + function + ")";
  }

        return inputStream.available();
    }

    @Override
    public boolean equals(final Object obj) {
        return inputStream.equals(obj);
    }

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

    @Override
    public synchronized void mark(final int readlimit) {
        inputStream.mark(readlimit);
    }

    @Override
    public boolean markSupported() {