checkNotNull(type);
    checkNotNull(value1);
    checkNotNull(value2);
    checkArgument(!Objects.equals(value1, value2), "Duplicate value provided.");
    distinctValues.replaceValues(type, ImmutableList.of(value1, value2));
    setDefault(type, value1);
    return this;
  }

  /**
   * Tests that {@code cls} properly checks null on all constructor and method parameters that

   * @deprecated Unsupported operation.
   */
  @CanIgnoreReturnValue
  @Deprecated
  @Override
  @DoNotCall("Always throws UnsupportedOperationException")
  public final ImmutableSet<V> replaceValues(K key, Iterable<? extends V> values) {
    throw new UnsupportedOperationException();
  }

  @LazyInit @RetainedWith private transient @Nullable ImmutableSet<Entry<K, V>> entries;

  /**

    }
    return collection;
  }

  // Bulk Operations

  /**
   * {@inheritDoc}
   *
   * <p>The returned collection is immutable.
   */
  @Override
  public Collection<V> replaceValues(@ParametricNullness K key, Iterable<? extends V> values) {
    Iterator<? extends V> iterator = values.iterator();
    if (!iterator.hasNext()) {
      return removeAll(key);
    }