public boolean exists(final Txn<ByteBuffer> txn, final K key) {
        try (final PooledByteBuffer pooledKeyBuffer = getPooledKeyBuffer()) {
            final ByteBuffer keyBuffer = pooledKeyBuffer.getByteBuffer();
            serializeKey(keyBuffer, key);
            return exists(txn, keyBuffer);
        }
    }
@return True if any entry exists with a key matching the passed key
stroom-lmdb/src/main/java/stroom/lmdb/AbstractLmdbDb.java