def all_internal_calls(self):
        """ recursive version of internal_calls
        """
        if self._all_internals_calls is None:
            self._all_internals_calls = self._explore_functions(lambda x: x.internal_calls)
        return self._all_internals_calls
def all_internal_calls ( self ) : if self . _all_internals_calls is None : self . _all_internals_calls = self . _explore_functions ( lambda x : x . internal_calls ) return self . _all_internals_calls
recursive version of internal_calls