return new UnsignedLong(bits);
  }

  /**
   * Returns an {@code UnsignedLong} representing the same value as the specified {@code long}.
   *
   * @throws IllegalArgumentException if {@code value} is negative
   * @since 14.0
   */
  @CanIgnoreReturnValue
  public static UnsignedLong valueOf(long value) {

      }
      try {
        int maxSize = digest.getDigestLength();
        new MessageDigestHashFunction(algorithmName, maxSize + 1, algorithmName);
        fail();
      } catch (IllegalArgumentException expected) {
      }
    } catch (NoSuchAlgorithmException nsae) {
      throw new AssertionError(nsae);
    }
  }

  /**
   * Creates a new, empty {@code LinkedHashMultiset} with the specified expected number of distinct
   * elements.
   *
   * @param distinctElements the expected number of distinct elements
   * @throws IllegalArgumentException if {@code distinctElements} is negative
   */
  public static <E extends @Nullable Object> LinkedHashMultiset<E> create(int distinctElements) {
    return new LinkedHashMultiset<>(distinctElements);
  }

  /**

   *     order the comparator should induce
   * @return the comparator described above
   * @throws NullPointerException if any of the provided values is null
   * @throws IllegalArgumentException if {@code valuesInOrder} contains any duplicate values
   *     (according to {@link Object#equals})
   */
  // TODO(kevinb): provide replacement
  @GwtCompatible(serializable = true)

  }

  public void testHashCodeNull() {
    assertEquals(control(NE, 1).hashCode(), entry(NE, 1).hashCode());
  }

  public void testNegativeCount() {
    assertThrows(IllegalArgumentException.class, () -> entry("foo", -1));
  }

        .invoke(future, badFuture);
    CancellationException expected = assertThrows(CancellationException.class, () -> future.get());
    assertThat(expected).hasCauseThat().isInstanceOf(IllegalArgumentException.class);
    assertThat(expected).hasCauseThat().hasMessageThat().contains(badFuture.toString());
  }

  private Future<?> newFutureInstance() throws Exception {

        this.handle.send(buf, off, length);
    }


    @Override
    protected int doReceiveFragment ( byte[] buf ) throws IOException {
        if ( buf.length < getMaxRecv() ) {
            throw new IllegalArgumentException("buffer too small");
        }

        int off = this.handle.recv(buf, 0, buf.length);
        if ( buf[ 0 ] != 5 || buf[ 1 ] != 0 ) {
            throw new IOException("Unexpected DCERPC PDU header");

        .invoke(future, badFuture);
    CancellationException expected = assertThrows(CancellationException.class, () -> future.get());
    assertThat(expected).hasCauseThat().isInstanceOf(IllegalArgumentException.class);
    assertThat(expected).hasCauseThat().hasMessageThat().contains(badFuture.toString());
  }

  private Future<?> newFutureInstance() throws Exception {

   * {@code enumClass} using {@link Enum#valueOf(Class, String)} and {@link Enum#name()}. The
   * converter will throw an {@code IllegalArgumentException} if the argument is not the name of any
   * enum constant in the specified enum.
   *
   * @since 16.0
   */
  @GwtIncompatible

                if (threads <= 0) {
                    throw new IllegalArgumentException(
                            "Invalid threads value: '" + threadConfiguration + "'. Value must be positive.");
                }
                return threads;
            }
        } catch (NumberFormatException e) {
            throw new IllegalArgumentException("Invalid threads value: '" + threadConfiguration