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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def setBehavior(self, behavior, cascade=True):
 """ Set behavior. If cascade is True, autoBehavior all descendants. """

        self.behavior = behavior
        if cascade:
            for obj in self.getChildren():
                obj.parentBehavior = behavior
                obj.autoBehavior(True)