// Prepare Data for Clear
	if err := DB.Model(&user2).Association("Languages").Append(&language); err != nil {
		t.Fatalf("Error happened when append Languages, got %v", err)
	}

	AssertAssociationCount(t, user2, "Languages", 1, "after prepare data")

	// Clear
	if err := DB.Model(&user2).Association("Languages").Clear(); err != nil {
		t.Errorf("Error happened when clear Languages, got %v", err)
	}

    @Override
    protected boolean isUseOneTimeContainer() {
        return true;
    }

    public void test_maxUsernameLength() throws IOException {
        FessProp.propMap.clear();
        FessConfig fessConfig = new FessConfig.SimpleImpl() {
            @Override
            public Integer getLdapMaxUsernameLengthAsInteger() {
                return Integer.valueOf(-1);
            }
        };

	// Prepare Data for Clear
	if err := DB.Model(&user2).Association("Pets").Append(&pet); err != nil {
		t.Fatalf("Error happened when append Pets, got %v", err)
	}

	AssertAssociationCount(t, user2, "Pets", 1, "after prepare data")

	// Clear
	if err := DB.Model(&user2).Association("Pets").Clear(); err != nil {
		t.Errorf("Error happened when clear Pets, got %v", err)
	}

        assertEquals(0, indexingHelper.deleteOldDocuments(client, docList));
        assertEquals(0, docList.size());
        assertEquals(0, deletedDocIdList.size());

        docList.clear();
        deletedDocIdList.clear();
        docList.add(new HashMap<>(Map.of(//
                "config_id", "W01", //
                "doc_id", "1", //
                "url", "http://test.com/001"//
        )));

        scoreUpdater.addScoreBooster(booster1);
        scoreUpdater.addScoreBooster(booster2);
        scoreUpdater.addScoreBooster(booster3);

        // Clear execution order before test
        PriorityTrackingBooster.clearExecutionOrder();

        scoreUpdater.execute();

        // Boosters should be executed in priority order (3, 2, 1)

    }
    return null;
  }

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

  /**

	}

	// Clear
	DB.Model(&blog2).Association("LocaleTags").Clear()
	if DB.Model(&blog).Association("LocaleTags").Count() != 3 {
		t.Fatalf("ZH Blog's tags should not be cleared when clear EN Blog's tags")
	}

	if DB.Model(&blog2).Association("LocaleTags").Count() != 0 {
		t.Fatalf("EN Blog's tags should be cleared when clear EN Blog's tags")
	}

    totalSize -= collection.size();
    collection.clear();

    return unmodifiableCollectionSubclass(output);
  }

  <E extends @Nullable Object> Collection<E> unmodifiableCollectionSubclass(
      Collection<E> collection) {
    return Collections.unmodifiableCollection(collection);
  }

  @Override
  public void clear() {
    // Clear each collection, to make previously returned collections empty.

			appendToRelations(reflectValue.Index(i), reflect.Indirect(reflect.ValueOf(values[i])), clear)
			if association.Error != nil {
				return
			}

			// TODO support save slice data, sql with case?
			association.Error = associationDB.Updates(reflectValue.Index(i).Addr().Interface()).Error
		}
	case reflect.Struct:
		// clear old data
		if clear && len(values) == 0 {

    // These return false, rather than throwing a UOE, on remove calls.
    return (unfiltered instanceof SetMultimap) ? emptySet() : emptyList();
  }

  @Override
  public void clear() {
    entries().clear();
  }

  @Override
  public Collection<V> get(@ParametricNullness K key) {
    return filterCollection(unfiltered.get(key), new ValuePredicate(key));
  }

  @Override