Method save

include/shared/rpc/MessageStorage.h:49–58

  }

  void
  save(size_t n)
  {
    _bw.commit(n);

    if (_bw.remaining() == 0) { // no more space available, flush what's on the bw
                                // and reset it.
      flush();
    }
  }

  size_t
  available() const