*     negative
   */
  int count(@CompatibleWith("E") @Nullable Object element);

  // Bulk Operations

  /**
   * Adds a number of occurrences of an element to this multiset. Note that if {@code occurrences ==
   * 1}, this method has the identical effect to {@link #add(Object)}. This method is functionally

        return !t.isAlive();
    }

    /**
     * Clears the managed {@link TimeoutTask}.
     */
    public synchronized void clear() {
        timeoutTaskList.clear();
    }

    /**
     * Adds a {@link TimeoutTarget}.
     *
     * @param timeoutTarget the target
     * @param timeout the timeout duration
     * @param permanent whether the task is permanent
     * @return the {@link TimeoutTask}
     */

    }

    Builder(Comparator<? super E> comparator, int expectedKeys) {
      super(expectedKeys, false);
      this.comparator = checkNotNull(comparator);
    }

    /**
     * Adds {@code element} to the {@code ImmutableSortedSet}. If the {@code ImmutableSortedSet}
     * already contains {@code element}, then {@code add} has no effect. (only the previously added
     * element is retained).
     *

            }
            break;
        }
        return url;
    }

    /**
     * Appends query parameters to URLs based on document type.
     * Adds search highlighting for HTML and PDF documents.
     *
     * @param document the document data map
     * @param url the base URL
     * @return the URL with appended query parameters
     */

    int numberOfThreads = 64;
    runConcurrentTest(
        numberOfThreads,
        new Callable<@Nullable Void>() {
          @Override
          public @Nullable Void call() throws Exception {
            // adds two nanoseconds to the ticker
            ticker.advance(1L);
            Thread.sleep(10);
            ticker.advance(1L);
            return null;
          }
        });

  }

  private static void runConcurrentlyMutatedTest(WrapWithIterable wrap) {
    /*
     * TODO: Iterate over many array sizes and all possible operation lists,
     * performing adds and removes in different ways.
     */
    runConcurrentlyMutatedTest(elements(), ops(add(1), add(2)), wrap);

    runConcurrentlyMutatedTest(elements(), ops(add(1), nop()), wrap);

    /**
     * Converter not associated with specific properties.
     */
    protected final List<Converter> converters = newArrayList();

    /**
     * Adds property names to include in the operation.
     *
     * @param propertyNames
     *            Array of property names. Must not be {@literal null} or an empty array.
     * @return This instance itself
     */

      valuesBuilder.add(value);
      return this;
    }

    /**
     * Adds an entry to the built multimap.
     *
     * @since 11.0
     */
    @CanIgnoreReturnValue
    public Builder<K, V> put(Entry<? extends K, ? extends V> entry) {
      return put(entry.getKey(), entry.getValue());
    }

    /**
     * Adds entries to the built multimap.
     *
     * @since 19.0
     */

    // Search Execute
    //

    /**
     * Performs bulk document operations (index multiple documents).
     * Validates document fields and adds default values where necessary.
     *
     * @param body the bulk request body containing documents to process
     * @return JSON response with bulk operation results
     */
    // PUT /api/admin/documents/bulk

  public EqualsTester() {
    this(/* itemReporter= */ Item::toString);
  }

  EqualsTester(RelationshipTester.ItemReporter itemReporter) {
    this.itemReporter = checkNotNull(itemReporter);
  }

  /**
   * Adds {@code equalityGroup} with objects that are supposed to be equal to each other and not
   * equal to any other equality groups added to this tester.
   *