code: public void init(InputStream is, OutputStream os)
    {
      this._is = is;
      _os = os;
      //setPath(null);
      _flushOnNewline = false;
      _closeChildOnClose = true;
      _position = 0;
    }
docs: Initializes a VfsStream with an input/output stream pair.  Before a
  read, the output will be flushed to avoid deadlocks.
  
  @param is the underlying InputStream.
  @param os the underlying OutputStream.