code: public byte[] getBytes() {
          byte[] retval = new byte[buffer.b().position()];
          int position = buffer.b().position();
          buffer.b().rewind();
          buffer.b().get(retval);
          assert position == buffer.b().position();
          return retval;
      }
docs: This method is slow and horrible. It entails an extra copy. Don't use it! Ever! Not even for test!
  Just say no to test only code. It will also leak the BBContainer if this FS is being used with a pool.