*oDontFeedMe = this->IsDone();
*oDontFeedMe = mDone;
NS_IMETHODIMP nsXPCOMDetectorBase::DoIt(  const char* aBuf, PRUint32 aLen, PRBool* oDontFeedMe){  NS_ASSERTION(mObserver != nsnull , "have not init yet");  if((nsnull == aBuf) || (nsnull == oDontFeedMe))     return NS_ERROR_ILLEGAL_VALUE;  this->HandleData(aBuf, aLen);  *oDontFeedMe = this->IsDone();  return NS_OK;}