result.add(new HashSet<E>(subset));
    }
    return result;
  }

  private static Object objectWithHashCode(final int hashCode) {
    return new Object() {
      @Override
      public int hashCode() {
        return hashCode;
      }
    };
  }

  // TODO b/327389044 - `Set<? extends Object> elements` should be enough but J2KT needs the <E>

    // #pending hashCode(), equals()
    @Override
    public int instanceHash() {
        return super.hashCode();
    }

    @Override
    public String toString() {
        return getClass().getSimpleName() + ":" + doBuildColumnString(", ") + "@" + Integer.toHexString(hashCode());
    }

    protected abstract String doBuildColumnString(String dm);

            }
        }
        return false;
    }


    /*
     * (non-Javadoc)
     * 
     * @see java.lang.Object#hashCode()
     */
    @Override
    public int hashCode () {
        return this.oid.hashCode();
    }


    /*
     * (non-Javadoc)
     * 
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString () {

 * additional documentation, including:
 *
 * <ul>
 *   <li><a
 *       href="https://github.com/google/guava/wiki/GraphsExplained#equals-hashcode-and-graph-equivalence">
 *       {@code equals()}, {@code hashCode()}, and graph equivalence</a>
 *   <li><a href="https://github.com/google/guava/wiki/GraphsExplained#synchronization">
 *       Synchronization policy</a>

      UnhashableObject that = (UnhashableObject) object;
      return this.value == that.value;
    }
    return false;
  }

  @Override
  public int hashCode() {
    throw new UnsupportedOperationException();
  }

  // needed because otherwise Object.toString() calls hashCode()
  @Override
  public String toString() {
    return "DontHashMe" + value;
  }

  @Override
  public int compareTo(UnhashableObject o) {

      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;

      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 sourceFormat.equals(that.sourceFormat) && targetFormat.equals(that.targetFormat);
      }
      return false;
    }

    @Override
    public int hashCode() {
      return sourceFormat.hashCode() ^ targetFormat.hashCode();
    }

    @Override
    public String toString() {
      return sourceFormat + ".converterTo(" + targetFormat + ")";
    }

      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;

        }
        return matched;
    }

    public List<String> getPatterns() {
        return new ArrayList<>(patterns);
    }

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

        return hash;
    }

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