*/
    public abstract OptionalEntity<T> get(long id);

    /**
     * Inserts a new dictionary item.
     *
     * @param item the item to insert
     */
    public abstract void insert(T item);

    /**
     * Updates an existing dictionary item.
     *
     * @param item the item to update
     */
    public abstract void update(T item);

    /**

            }

            @Override
            public void add(String sessionId, String url) {
            }

            @Override
            public void insert(UrlQueue<?> urlQueue) {
            }

            @Override
            public void delete(String sessionId) {
            }

            @Override
            public void deleteAll() {
            }

    //                                                                              ======
    public void insert(User entity) {
        doInsert(entity, null);
    }

    public void insert(User entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doInsert(entity, null);
    }

        dstIndex += writeHeaderWireFormat(dst, dstIndex);
        dstIndex += writeAndXWireFormat(dst, dstIndex);
        length = dstIndex - start;

        if (digest != null) {
            digest.sign(dst, headerStart, length, this, response);
        }

        return length;
    }

    /*
     * We overload this because we want readAndXWireFormat to

            // write log
            if (fessConfig.isLoggingSearchUseLogfile()) {
                searchLogList.forEach(this::writeSearchLogEvent);
            }
            // insert search log
            storeSearchLogList(searchLogList);
            // update suggest index
            if (fessConfig.isSuggestSearchLog()) {

                    md4.update(responseKeyNT);
                    final byte[] userSessionKey = md4.digest();

                    final HMACT64 hmac = new HMACT64(userSessionKey);
                    hmac.update(sessionNonce);
                    final byte[] ntlm2SessionKey = hmac.digest();

                    if ((getFlags() & NTLMSSP_NEGOTIATE_KEY_EXCH) != 0) {
                        masterKey = new byte[16];

        sb.append(dm).append(updatedBy);
        sb.append(dm).append(updatedTime);
        if (sb.length() > dm.length()) {
            sb.delete(0, dm.length());
        }
        sb.insert(0, "{").append("}");
        return sb.toString();
    }

    // ===================================================================================

        sb.append(dm).append(updatedTime);
        sb.append(dm).append(virtualHost);
        if (sb.length() > dm.length()) {
            sb.delete(0, dm.length());
        }
        sb.insert(0, "{").append("}");
        return sb.toString();
    }

    // ===================================================================================

        sb.append(dm).append(value);
        sb.append(dm).append(webConfigId);
        if (sb.length() > dm.length()) {
            sb.delete(0, dm.length());
        }
        sb.insert(0, "{").append("}");
        return sb.toString();
    }

    // ===================================================================================

     */
    public void store(final String dictId, final KuromojiItem kuromojiItem) {
        getKuromojiFile(dictId).ifPresent(file -> {
            if (kuromojiItem.getId() == 0) {
                file.insert(kuromojiItem);
            } else {
                file.update(kuromojiItem);
            }
        });
    }

    /**
     * Delete a Kuromoji item.
     *