public LmdbEnv getLmdbEnvironment() {
        return lmdbEnvironment;
    }
@return A {@link PooledByteBufferPair} containing direct {@link ByteBuffer}s from the
pool. The key buffer's capacity is sufficient for this database's key type while the
value buffer capacity is at least as specified.
stroom-lmdb/src/main/java/stroom/lmdb/AbstractLmdbDb.java