code: @Override
    public final void close()
      throws IOException
    {
      State state = _state;
      
      if (state.isClosing()) {
        return;
      }
      
      _state = state.toClosing();
      
      try {
        flush(true);
      } finally {
        try {
          _state = _state.toClose();
        } catch (RuntimeException e) {
          throw new RuntimeException(state + ": " + e, e);
        }
      }
    }
docs: Closes the response stream