operator=( const nsCOMPtr_helper& rhs )
operator=( T* rhs )
      operator=( const nsCOMPtr_helper& rhs )          // ...and finally, anything else we might need to assign from          //  can exploit the |nsCOMPtr_helper| facility.        {          assign_from_helper(rhs, NS_GET_IID(nsISupports));          return *this;        }