List<CompletableFuture<Void>> taskFutures = new ArrayList<>(asyncNotifyTasks.values());
        for (CompletableFuture<Void> task : taskFutures) {
            task.cancel(true);
        }
        asyncNotifyTasks.clear();

        // Unregister all active registrations
        List<CompletableFuture<Void>> unregisterFutures = new ArrayList<>();

        for (WitnessRegistration registration : registrations.values()) {

      assertTrue(Thread.holdsLock(mutex));
      return delegate.retainAll(collection);
    }

    @Override
    public void clear() {
      assertTrue(Thread.holdsLock(mutex));
      delegate.clear();
    }

    @Override
    public Object[] toArray() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.toArray();
    }

    @Override

            } catch (final Exception e) {
                logger.warn("Failed to restore " + urlQueue, e);
            }
        }));
    }

    /**
     * Clears the cache.
     */
    public void clearCache() {
        sessionCache.clear();
    }

    /**
     * Updates the session ID for all URL queue entries.
     *
     * @param oldSessionId The old session ID.

            try {
                unit.close()
            } catch (ex: Exception) {
                errors.add(ex)
            }
        }
        openJavaCompilationUnitsByFile.clear()
        openKotlinCompilationUnitsByRoot.clear()
        if (errors.isNotEmpty()) {
            throw Exception("Sources repository did not close cleanly").apply {
                errors.forEach(this::addSuppressed)
            }
        }

                } catch (final Exception e) {
                    logger.warn("Failed to close the crawler.", e);
                }
            });
        }
        crawlerList.clear();
        crawlerStatusList.clear();

        // put cralwing info
        final CrawlingInfoHelper crawlingInfoHelper = ComponentUtil.getCrawlingInfoHelper();

                    inExample = true;
                    currentSnippets.clear();
                } else {
                    // Closing an example block: check for reversed order only
                    flagIfReversed(file, errors, currentSnippets);
                    inExample = false;
                    currentSnippets.clear();
                }
                continue;
            }

     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })
    public HtmlResponse search(final SearchForm form) {
        saveToken();
        searchLogPager.clear();
        copyBeanToBean(form, searchLogPager, op -> op.exclude(Constants.PAGER_CONVERSION_RULE));
        searchLogPager.setPageSize(form.getPageSize());

        return count;
    }

    /**
     * Clears a scroll context.
     *
     * @param scrollId The scroll ID to clear.
     */
    public void clearScroll(final String scrollId) {
        if (scrollId != null) {
            prepareClearScroll().addScrollId(scrollId)
                    .execute(ActionListener.wrap(res -> {}, e -> logger.warn("Failed to clear scroll context: scrollId={}", scrollId, e)));
        }
    }

   * a black-box test that tries to create lots of different thread-interleavings, and asserts that
   * each computation is affected by a call to {@code clear()} (and therefore gets passed to the
   * removal listener), or else is not affected by the {@code clear()} (and therefore exists in the
   * cache afterward).
   */
  @GwtIncompatible // QueuingRemovalListener

  }

  /**
   * A sensible definition of {@link #clear} in terms of the {@code iterator} method of {@link
   * #entrySet}. If you override {@link #entrySet}, you may wish to override {@link #clear} to
   * forward to this implementation.
   *
   * @since 7.0
   */
  @Override
  protected void standardClear() {
    Iterators.clear(entrySet().iterator());
  }

  /**