code: public static ByteBuffer removeSizePrefix(ByteBuffer bb) {
          ByteBuffer s = bb.duplicate();
          s.position(s.position() + SIZE_PREFIX_LENGTH);
          return s;
      }
docs: Create a duplicate of a size-prefixed `ByteBuffer` that has its position
  advanced just past the size prefix.
  
  @param bb a size-prefixed buffer
  @return a new buffer on the same underlying data that has skipped the
  size prefix