if ( mRawPtr ) NSCAP_ADDREF(this, mRawPtr);
assign_from_helper(helper, NS_GET_IID(nsISupports));
      nsCOMPtr( nsISupports* aRawPtr )            : nsCOMPtr_base(aRawPtr)          // construct from a raw pointer (of the right type)        {          if ( mRawPtr )            NSCAP_ADDREF(this, mRawPtr);        }