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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 get_leaves(self):
 """Get the deepest entries as a flat set."""

        ret_set = set()
        for val in self.values():
            if isinstance(val, self.__class__):
                ret_set |= val.get_leaves()
            elif isinstance(val, dict):
                ret_set |= set(val.values())
            elif isinstance(val, list):
                ret_set |= set(val)
            elif isinstance(val, set):
                ret_set |= val
            else:
                ret_set.add(val)
        return ret_set