def run_func(self):
        """ return all the function we have."""
        def run(leader, follower):
            return all([LINK_MAP[f.name](leader, follower, f.args(True)) \
                        for f in self._tokens if isinstance(f, FunctionDecl)])
        return run
 return all the function we have.
fedlearner/data_join/join_expr/expression.py