def contains(self, k):
        if self._changed():
            self._read()
        return k in self.store.keys()
Sets up the initial relations between this element and
dataset/ETHPy150Open calston/tensor/tensor/utils.py/PersistentCache.contains--crossover with--dataset/ETHPy150Open socketubs/pyhn/pyhn/lib/bs4_py3/element.py/PageElement.setup