public static boolean isLmdbDataFile(final Path file) {
        return file != null
                && (file.endsWith(DATA_FILE_NAME) || file.endsWith(LOCK_FILE_NAME));
    }
Deletes {@link LmdbEnv} from the filesystem if it is already closed.
stroom-lmdb/src/main/java/stroom/lmdb2/LmdbEnvDir.java