code: public void handleFlushedMessage(ControlFlushed cMsg)
      throws SIResourceException
    {
      if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
        SibTr.entry(this, tc, "handleFlushedMessage", new Object[] { cMsg });
  
      SIBUuid12 streamID = cMsg.getGuaranteedStreamUUID();
      forceFlush(streamID);
  
      if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
        SibTr.exit(tc, "handleFlushedMessage");
    }
docs: Handle a ControlFlushed message. Flush any existing streams and
  throw away any cached messages.
  
  @param cMsg
  @throws SIResourceException