// subset of CP-437, which itself is ASCII-like.
		//
		// Forbid 0x7e and 0x5c since EUC-KR and Shift-JIS replace those
		// characters with localized currency and overline characters.
		if r < 0x20 || r > 0x7d || r == 0x5c {
			if !utf8.ValidRune(r) || (r == utf8.RuneError && size == 1) {
				return false, false
			}
			require = true
		}
	}
	return true, require
}

    }

    @Override
    protected Multiset<T> delegate() {
      return backingCollection;
    }

    @Override
    public boolean addAll(Collection<? extends T> collection) {
      return standardAddAll(collection);
    }

    @Override
    public boolean add(T element) {
      return standardAdd(element);
    }

    @Override
    public void clear() {
      standardClear();

    }

    @Override
    public String getClassifier() {
        return classifier;
    }

    @Override
    public boolean hasClassifier() {
        return classifier != null && !classifier.isEmpty();
    }

    @Override
    public String getScope() {
        return scope;
    }

    @Override
    public String getGroupId() {
        return groupId;

    @Override
    @CheckForNull
    public K pollLast() {
      return Iterators.pollNext(descendingIterator());
    }

    @Override
    public NavigableSet<K> descendingSet() {
      return new NavigableKeySet(sortedMap().descendingMap());
    }

    @Override
    public Iterator<K> descendingIterator() {
      return descendingSet().iterator();
    }

    @Override

    @Override
    public RemoteRepository getRemoteRepository(org.eclipse.aether.repository.RemoteRepository repository) {
        return allRepositories.computeIfAbsent(repository, DefaultRemoteRepository::new);
    }

    @Override
    public Node getNode(org.eclipse.aether.graph.DependencyNode node) {
        return getNode(node, false);
    }

    @Override

    @Override
    @CheckForNull
    public Map<R, V> remove(@CheckForNull Object key) {
      return containsColumn(key) ? removeColumn(key) : null;
    }

    @Override
    public Set<Entry<C, Map<R, V>>> createEntrySet() {
      return new ColumnMapEntrySet();
    }

    @Override
    public Set<C> keySet() {
      return columnKeySet();
    }

    @Override

    @Override
    public void tearDown() throws IOException {}
  }

  private static class ByteArraySourceFactory implements ByteSourceFactory {

    @Override
    public ByteSource createSource(byte[] bytes) throws IOException {
      return ByteSource.wrap(bytes);
    }

    @Override
    public byte[] getExpected(byte[] bytes) {
      return bytes;
    }

    @Override

      @Override
      public Set<N> predecessors(N node) {
        return AbstractNetwork.this.predecessors(node);
      }

      @Override
      public Set<N> successors(N node) {
        return AbstractNetwork.this.successors(node);
      }

      // DO NOT override the AbstractGraph *degree() implementations.
    };
  }

  @Override
  public int degree(N node) {
    if (isDirected()) {

                  @Override
                  public String[] createKeyArray(int length) {
                    return new String[length];
                  }

                  @Override
                  public Integer[] createValueArray(int length) {
                    return new Integer[length];
                  }

                  @Override

  }

  enum Impl {
    NEW {
      @Override
      ExecutionListWrapper newExecutionList() {
        return new ExecutionListWrapper() {
          final ExecutionList list = new ExecutionList();

          @Override
          public void add(Runnable runnable, Executor executor) {
            list.add(runnable, executor);
          }

          @Override
          public void execute() {