@Override
            public void read(long position, byte[] buffer, int offset, int length) {
                byteBuffer.position((int) position);
                byteBuffer.get(buffer, offset, length);
            }
Wrap a ByteBufferReader into an {@link Opener}.
Note that the close will <b>not</b> passed to the opener,
indexr-common/src/main/java/io/indexr/io/ByteBufferReader.java