def _reset_alt_context(self, ctx):
        node_state = self._get_state(ctx)
        node_state.alt_context = None
        node_state.prev_alt_context = None
Removes y first and in a second run removes x as well.
dataset/ETHPy150Open manahl/mdf/mdf/nodes.py/MDFNode._reset_alt_context--crossover with--dataset/ETHPy150Open zynga/jasy/jasy/test/js/unused.py/Tests.test_var_dep_closure