}

  @Override
  Map<K, Collection<V>> createAsMap() {
    return new AsMap();
  }

  @Override
  Set<K> createKeySet() {
    return asMap().keySet();
  }

  boolean removeEntriesIf(Predicate<? super Entry<K, Collection<V>>> predicate) {
    Iterator<Entry<K, Collection<V>>> entryIterator = unfiltered.asMap().entrySet().iterator();
    boolean changed = false;
    while (entryIterator.hasNext()) {

  }

  @Override
  Map<K, Collection<V>> createAsMap() {
    return new AsMap();
  }

  @Override
  Set<K> createKeySet() {
    return asMap().keySet();
  }

  boolean removeEntriesIf(Predicate<? super Entry<K, Collection<V>>> predicate) {
    Iterator<Entry<K, Collection<V>>> entryIterator = unfiltered.asMap().entrySet().iterator();
    boolean changed = false;
    while (entryIterator.hasNext()) {

            solutions == [ 'Use type \'java.net.URI\' instead' ]
            additionalData.asMap == [
                'typeName' : 'MyTask',
                'propertyName' : 'direct',
            ]
        }
        verifyAll(receivedProblem(1)) {

                solutions == [
                    'Add an input or output annotation',
                    'Mark it as @Internal',
                ]
                additionalData.asMap == [
                    'typeName' : 'MyTask',
                    'propertyName' : 'badTime',
                ]
            }
            verifyAll(receivedProblem(1)) {

      try {
        multimap.asMap().get(presentKey).remove(sampleValue);
        fail("asMap().get().remove() succeeded on unmodifiable multimap");
      } catch (UnsupportedOperationException expected) {
      }
      assertMultimapRemainsUnmodified(multimap, originalEntries);

      try {
        multimap.asMap().values().iterator().next().remove(sampleValue);

            solutions == [
                'Add an input or output annotation',
                'Mark it as @Internal',
            ]
            additionalData.asMap == [
                'parentPropertyName' : 'tree',
                'typeName' : 'MyTask',
                'propertyName' : 'nonAnnotated',
            ]
        }

    }

      try {
        multimap.asMap().get(presentKey).remove(sampleValue);
        fail("asMap().get().remove() succeeded on unmodifiable multimap");
      } catch (UnsupportedOperationException expected) {
      }
      assertMultimapRemainsUnmodified(multimap, originalEntries);

      try {
        multimap.asMap().values().iterator().next().remove(sampleValue);

            solutions == [
                'Assign a value to \'destFile\'',
                'Mark property \'destFile\' as optional',
            ]
            additionalData.asMap == [
                'typeName' : 'CustomTask',
                'propertyName' : 'destFile',
            ]
        }
        verifyAll(receivedProblem(1)) {

                'Use a RegularFile instance',
                'Use a URI or URL instance',
                'Use a TextResource instance',
            ]
            additionalData.asMap == [
                'typeName': 'org.gradle.api.DefaultTask',
                'propertyName': 'input',
            ]
        }

        where:
        method | targetType
        "dir"  | "directory"

  }

  /**
   * Returns {@link SetMultimap#asMap multimap.asMap()}, with its type corrected from {@code Map<K,
   * Collection<V>>} to {@code Map<K, Set<V>>}.
   *
   * @since 15.0
   */
  @SuppressWarnings("unchecked")
  // safe by specification of SetMultimap.asMap()
  public static <K extends @Nullable Object, V extends @Nullable Object> Map<K, Set<V>> asMap(