assertNotNull(getSingletonInstanceViaReflection()); // Should be initialized now
    }

    @Test
    void testGetInstanceReturnsExistingInstance() throws CIFSException {
        // Test getInstance returns the existing instance
        SingletonContext.init(null);
        CIFSContext firstInstance = SingletonContext.getInstance();
        CIFSContext secondInstance = SingletonContext.getInstance();

        }
        return asJson(new ApiResult.ApiUpdateResponse().id(entity.getId()).created(true).status(ApiResult.Status.OK).result());
    }

    // PUT /api/admin/pathmap/setting
    /**
     * Updates an existing path mapping setting.
     *
     * @param body path mapping setting data to update
     * @return JSON response with updated setting ID and status
     */
    @Execute

        });

        return asJson(new ApiUpdateResponse().id(relatedContent.getId()).created(true).status(Status.OK).result());
    }

    // PUT /api/admin/relatedcontent/setting
    /**
     * Updates an existing related content setting.
     *
     * @param body related content setting data to update
     * @return JSON response with updated setting ID and status
     */
    @Execute

   * {@link Multimap} interface.
   */
  @CanIgnoreReturnValue
  @Override
  SortedSet<V> removeAll(@Nullable Object key);

  /**
   * Stores a collection of values with the same key, replacing any existing values for that key.
   *
   * <p>Because a {@code SortedSetMultimap} has unique sorted values for a given key, this method
   * returns a {@link SortedSet}, instead of the {@link java.util.Collection} specified in the

        #  And ReplaceSchema task basically ignores this.
        #
        #  Normally this 'except' means no getting meta data for excepted tables.
        #  (so the tables are not existing in SchemaHTML and HistoryHTML and so on).
        #  But you can specify the '@gen' suffix that means generate-only except.
        #  A table with the mark can be treated as documents but no generating classes.
        #

                    notifications.add(notification);
                  }
                })
            .build();
    cache.put(1, 2);

    // explicitly remove the existing value
    cache.asMap().computeIfPresent(1, (key, value) -> null);
    assertThat(notifications).hasSize(1);
    CacheTesting.checkEmpty(cache);

    // ensure no zombie entry remains

      Class<E> clazz) {
    Map<E, LockGraphNode> existing = (Map<E, LockGraphNode>) lockGraphNodesPerType.get(clazz);
    if (existing != null) {
      return existing;
    }
    Map<E, LockGraphNode> created = createNodes(clazz);
    existing = (Map<E, LockGraphNode>) lockGraphNodesPerType.putIfAbsent(clazz, created);
    return MoreObjects.firstNonNull(existing, created);
  }

  /**

            throwValidationError(messages -> messages.addErrorsCrudFailedToCreateInstance(GLOBAL), this::asEditHtml);
        });
        return redirect(getClass());
    }

    /**
     * Updates an existing key match.
     *
     * @param form the edit form
     * @return HTML response after update
     */
    @Execute
    @Secured({ ROLE })
    public HtmlResponse update(final EditForm form) {

        assertEquals(0b0001, message.getFlags(), "Flag 0b0001 should be set.");

        message.setFlag(0b0100, true);
        assertEquals(0b0101, message.getFlags(), "Flag 0b0100 should be added to existing flags.");

        // Test clearing a flag
        message.setFlag(0b0001, false);
        assertEquals(0b0100, message.getFlags(), "Flag 0b0001 should be cleared.");

        message.setFlag(0b0100, false);

        if (keyLength == 32) {
            // AES-256 support
            transformation = "AES/GCM/NoPadding";
        } else if (keyLength == 16) {
            // AES-128 (existing)
            transformation = "AES/GCM/NoPadding";
        } else {
            throw new IllegalArgumentException("Unsupported key length for GCM: " + keyLength);
        }

        byte[] key = null;