return get((K) key).remove(value);
    }

    @SuppressWarnings("unchecked")
    @Override
    public Collection<V2> removeAll(@Nullable Object key) {
      return transform((K) key, fromMultimap.removeAll(key));
    }

    @Override
    public Collection<V2> replaceValues(@ParametricNullness K key, Iterable<? extends V2> values) {

      return get((K) key).remove(value);
    }

    @SuppressWarnings("unchecked")
    @Override
    public Collection<V2> removeAll(@Nullable Object key) {
      return transform((K) key, fromMultimap.removeAll(key));
    }

    @Override
    public Collection<V2> replaceValues(@ParametricNullness K key, Iterable<? extends V2> values) {

  }

  @Override
  public Set<V> get(@ParametricNullness K key) {
    return delegate().get(key);
  }

  @CanIgnoreReturnValue
  @Override
  public Set<V> removeAll(@Nullable Object key) {
    return delegate().removeAll(key);
  }

  @CanIgnoreReturnValue
  @Override
  public Set<V> replaceValues(@ParametricNullness K key, Iterable<? extends V> values) {
    return delegate().replaceValues(key, values);

    @Override
    public int size() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.size();
    }

    @Override
    public boolean removeAll(Collection<?> collection) {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.removeAll(collection);
    }

    @Override
    public boolean isEmpty() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.isEmpty();
    }

   * returns a {@link SortedSet}, instead of the {@link Collection} specified in the {@link
   * Multimap} interface.
   */
  @CanIgnoreReturnValue
  @Override
  public SortedSet<V> removeAll(@Nullable Object key) {
    return (SortedSet<V>) super.removeAll(key);
  }

  /**
   * Stores a collection of values with the same key, replacing any existing values for that key.
   * The returned collection is immutable.
   *

      K k = (K) key;
      return keyPredicate.apply(k);
    }
    return false;
  }

  @Override
  public Collection<V> removeAll(@Nullable Object key) {
    return containsKey(key) ? unfiltered.removeAll(key) : unmodifiableEmptyCollection();
  }

  @SuppressWarnings("EmptyList") // ImmutableList doesn't support nullable element types
  Collection<V> unmodifiableEmptyCollection() {

      K k = (K) key;
      return keyPredicate.apply(k);
    }
    return false;
  }

  @Override
  public Collection<V> removeAll(@Nullable Object key) {
    return containsKey(key) ? unfiltered.removeAll(key) : unmodifiableEmptyCollection();
  }

  @SuppressWarnings("EmptyList") // ImmutableList doesn't support nullable element types
  Collection<V> unmodifiableEmptyCollection() {

  }

  /**
   * Confirm that removeAll() returns a List that implements RandomAccess, even though get()
   * doesn't.
   */
  public void testRemoveAllRandomAccess() {
    Multimap<String, Integer> multimap = create();
    multimap.put("foo", 1);
    multimap.put("foo", 3);
    assertTrue(multimap.removeAll("foo") instanceof RandomAccess);
    assertTrue(multimap.removeAll("bar") instanceof RandomAccess);
  }

   * <p>This is equivalent to calling {@link #remove} on each of the ranges in {@code other} in
   * turn.
   *
   * @throws UnsupportedOperationException if this range set does not support the {@code removeAll}
   *     operation
   */
  void removeAll(RangeSet<C> other);

  /**
   * Removes all of the specified ranges from this range set (optional operation).
   *

    }

    @Override
    public boolean remove(final Object o) {
        return parent.remove(o);
    }

    @Override
    public boolean removeAll(final Collection<?> c) {
        return parent.removeAll(c);
    }

    @Override
    public boolean retainAll(final Collection<?> c) {
        return parent.retainAll(c);
    }

    @Override