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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 stored_bind(self, instance):
 """Bind an instance to this Pangler, using the bound Pangler store. This method functions identically to `bind`, except that it might return a Pangler which was previously bound to the provided instance. """


        if self.id is None:
            return self.bind(instance)

        store = self._bound_pangler_store.setdefault(instance, {})
        p = store.get(self.id)
        if p is None:
            p = store[self.id] = self.bind(instance)
        return p