def get_guardians(self, run):
        if run in self._graph.nodes():
            return self._graph.predecessors(run)
        else:
            return []

    #
    # Private methods
    #
Return a list of nodes on whom the specific node is control dependent in the control dependence graph
dataset/ETHPy150Open angr/angr/angr/analyses/cdg.py/CDG.get_guardians