}

    @Override
    public boolean removeAll(final Collection<?> collection) {
      return removeIf(collection::contains);
    }

    @Override
    public boolean retainAll(final Collection<?> collection) {
      return removeIf(element -> !collection.contains(element));
    }

    @Override

    StringBuilder sb = newStringBuilderForCollection(collection.size()).append('[');
    boolean first = true;
    for (Object o : collection) {
      if (!first) {
        sb.append(", ");
      }
      first = false;
      if (o == collection) {
        sb.append("(this Collection)");
      } else {
        sb.append(o);
      }
    }
    return sb.append(']').toString();

codehaus.plexus.PlexusContainer, String); public boolean add(Object); public void add(int, Object); public boolean addAll(java.util.Collection); public boolean addAll(int, java.util.Collection); public void clear(); public boolean remove(Object); public Object remove(int); public boolean removeAll(java.util.Collection); public boolean retainAll(java.util.Collection); public Object set(int, Object); protected final java.util.List checkedGetList() throws org.codehaus.plexus.component.repository.ex...

codehaus.plexus.PlexusContainer, String); public boolean add(Object); public void add(int, Object); public boolean addAll(java.util.Collection); public boolean addAll(int, java.util.Collection); public void clear(); public boolean remove(Object); public Object remove(int); public boolean removeAll(java.util.Collection); public boolean retainAll(java.util.Collection); public Object set(int, Object); protected final java.util.List checkedGetList() throws org.codehaus.plexus.component.repository.ex...

      Collection<V> collection) {
    if (collection instanceof SortedSet) {
      return Collections.unmodifiableSortedSet((SortedSet<V>) collection);
    } else if (collection instanceof Set) {
      return Collections.unmodifiableSet((Set<V>) collection);
    } else if (collection instanceof List) {
      return Collections.unmodifiableList((List<V>) collection);
    }

      Entry<K, Collection<V>> entry = entryIterator.next();
      K key = entry.getKey();
      Collection<V> collection = filterCollection(entry.getValue(), new ValuePredicate(key));
      if (!collection.isEmpty() && predicate.apply(Maps.immutableEntry(key, collection))) {
        if (collection.size() == entry.getValue().size()) {
          entryIterator.remove();
        } else {
          collection.clear();
        }

    }

    @Override
    public boolean addAll(Collection<? extends V> collection) {
      addAll(0, collection);
      return true;
    }

    @CanIgnoreReturnValue
    @Override
    public boolean addAll(int index, Collection<? extends V> elements) {
      checkNotNull(elements);
      checkPositionIndex(index, 0);

    }

    @Override
    public boolean addAll(Collection<? extends V> collection) {
      addAll(0, collection);
      return true;
    }

    @CanIgnoreReturnValue
    @Override
    public boolean addAll(int index, Collection<? extends V> elements) {
      checkNotNull(elements);
      checkPositionIndex(index, 0);

                        "Multi module project collection failed:{}"
                                + "Detected a POM file next to a .mvn directory in a parent directory ({}). "
                                + "Maven assumed that POM file to be the parent of the requested project ({}), but it turned "
                                + "out that it was not. Another project collection strategy will be executed as result.",

   */
  public static boolean elementsEqual(Iterable<?> iterable1, Iterable<?> iterable2) {
    if (iterable1 instanceof Collection && iterable2 instanceof Collection) {
      Collection<?> collection1 = (Collection<?>) iterable1;
      Collection<?> collection2 = (Collection<?>) iterable2;
      if (collection1.size() != collection2.size()) {
        return false;
      }
    }