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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 is_subgroup(self, supergroup):
 """ True if this group is a subgroup of the supplied group. Args: supergroup (SymmetryGroup):
 Supergroup to test. Returns: True if this group is a subgroup of the supplied group. """

        warnings.warn("This is not fully functional. Only trivial subsets are tested right now. ")
        return set(self.symmetry_ops).issubset(supergroup.symmetry_ops)