result[0] = elemCount;
      if (expectedCount == elemCount) {
        if (newCount == 0) {
          return deleteMe();
        }
        this.totalCount += newCount - elemCount;
        this.elemCount = newCount;
      }
      return this;
    }

    private @Nullable AvlNode<E> deleteMe() {
      int oldElemCount = this.elemCount;
      this.elemCount = 0;
      successor(pred(), succ());

    }

    /**
     * Deletes all documents associated with the specified session ID from the given index.
     *
     * @param searchEngineClient the search engine client to use for deletion
     * @param index the index name to delete documents from
     * @param sessionId the session ID to delete documents for
     * @return the number of documents that were deleted
     */

                    .forEach(k -> addSystemProperty(cmdList, k.toString(), null, null));
        }
    }

    /**
     * Deletes the specified temporary directory.
     * Logs a warning if the directory cannot be deleted.
     *
     * @param ownTmpDir the temporary directory to delete
     */
    protected void deleteTempDir(final File ownTmpDir) {
        if (ownTmpDir == null) {
            return;
        }

                    // updated file
                    addDocument(localParams, dataMap);
                } else if (getParamValue(localParams, "event.delete", "delete").equals(eventType)) {
                    // deleted file
                    deleteDocument(localParams, dataMap);
                } else {
                    logger.warn("unknown event: {}, data: {}", eventType, dataMap);
                }

    }

    /**
     * Deletes all words from the suggest index.
     *
     * @return true if the operation was successful, false otherwise.
     */
    public boolean deleteAllWords() {
        final SuggestDeleteResponse response = suggester.indexer().deleteAll();
        if (response.hasError()) {
            logger.warn("Failed to delete all words.", response.getErrors().get(0));

            @Override
            public long purge(long expiry) {
                // Just count files that would be deleted
                return 1L;
            }
        };
        testManager.baseDir = tempDir;

        long result = testManager.purge(1L);
        assertTrue(result >= 0); // Count of deleted files
    }

    // Test FilePurgeVisitor
    public void test_FilePurgeVisitor() throws IOException {

    }

    /**
     * Deletes a user setting by ID.
     *
     * @param id the ID of the user setting to delete
     * @return JSON response indicating success or failure
     */
    // DELETE /api/admin/user/setting/{id}
    @Execute
    public JsonResponse<ApiResult> delete$setting(final String id) {
        final User entity = userService.getUser(id).orElseGet(() -> {

    }

    /**
     * Deletes a related query setting by ID.
     *
     * @param id the ID of the related query to delete
     * @return JSON response confirming deletion status
     */
    // DELETE /api/admin/relatedquery/setting/{id}
    @Execute
    public JsonResponse<ApiResult> delete$setting(final String id) {

    }

    /**
     * Deletes a document asynchronously.
     *
     * @param request the delete request
     * @return a future for the delete response
     */
    @Override
    public ActionFuture<DeleteResponse> delete(final DeleteRequest request) {
        return client.delete(request);
    }

    /**
     * Deletes a document asynchronously with a callback.
     *

    }

    /**
     * Deletes a Kuromoji dictionary item by ID.
     *
     * @param dictId the dictionary ID
     * @param id the ID of the Kuromoji item to delete
     * @return JSON response indicating the deletion status
     */
    // DELETE /api/admin/dict/kuromoji/setting/{dictId}/{id}
    @Execute
    public JsonResponse<ApiResult> delete$setting(final String dictId, final long id) {