*/
  boolean allowsParallelEdges();

  /**
   * Returns true if this network allows self-loops (edges that connect a node to itself).
   * Attempting to add a self-loop to a network that does not allow them will throw an {@link
   * IllegalArgumentException}.
   */
  boolean allowsSelfLoops();

  /** Returns the order of iteration for the elements of {@link #nodes()}. */

   */
  protected final String escapeSlow(String s, int index) {
    int end = s.length();

    // Get a destination buffer and setup some loop variables.
    char[] dest = Platform.charBufferFromThreadLocal();
    int destIndex = 0;
    int unescapedChunkStart = 0;

    while (index < end) {
      int cp = codePointAt(s, index, end);

   * #descendingMap}. (The {@link StandardDescendingMap} implementation implements {@code
   * navigableKeySet} on its own, so as not to cause an infinite loop.) If you override {@code
   * descendingMap}, you may wish to override {@code descendingKeySet} to forward to this
   * implementation.
   */
  protected NavigableSet<K> standardDescendingKeySet() {

   * #descendingMap}. (The {@link StandardDescendingMap} implementation implements {@code
   * navigableKeySet} on its own, so as not to cause an infinite loop.) If you override {@code
   * descendingMap}, you may wish to override {@code descendingKeySet} to forward to this
   * implementation.
   */
  protected NavigableSet<K> standardDescendingKeySet() {

   */
  protected final String escapeSlow(String s, int index) {
    int end = s.length();

    // Get a destination buffer and setup some loop variables.
    char[] dest = Platform.charBufferFromThreadLocal();
    int destIndex = 0;
    int unescapedChunkStart = 0;

    while (index < end) {
      int cp = codePointAt(s, index, end);

                break;
              } catch (CancellationException e) {
                finalResults.add(CancellationException.class);
                break;
              } catch (TimeoutException e) {
                // loop
              }
            }
            awaitUnchecked(barrier);
          }
        };
    List<Callable<?>> allTasks = new ArrayList<>();
    allTasks.add(completeSuccessfullyRunnable);

 * associated with it: It is not possible to "remove" a value, only to replace it with {@code null},
 * which will still appear when iterating over the table's contents in a foreach loop or a call to a
 * null-hostile method like {@link ImmutableTable#copyOf}. For alternatives, please see <a
 * href="https://github.com/google/guava/wiki/NewCollectionTypesExplained#table">the wiki</a>.
 *

                         * with node status so we need to check to make sure that
                         * the record type matches the question type and if not,
                         * loop around and try again.
                         */
                        if (response.received && request.questionType == response.recordType) {
                            return;
                        }

     * and updates the search index until crawling is finished and all documents are processed.
     *
     * <p>The method performs the following operations in a loop:
     * <ul>
     * <li>Retrieves access results from the data service</li>
     * <li>Processes each document through transformers</li>
     * <li>Applies document boosting and metadata enhancements</li>

      }
    }
  }

  private void recurse(int level) {
    // We're going to reuse the stimuli array 3^steps times by overwriting it
    // in a recursive loop.  Sneaky.
    if (level == stimuli.length) {
      // We've filled the array.
      compareResultsForThisListOfStimuli();
    } else {
      // Keep recursing to fill the array.