@chainable_method
    def clear(self):
        self.database.delete(self.key)
.. todo::
dataset/ETHPy150Open coleifer/walrus/walrus/containers.py/Container.clear--crossover with--dataset/ETHPy150Open lisa-lab/pylearn2/pylearn2/models/dbm/ising.py/BoltzmannIsingHidden.get_total_state_space