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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 _parent_foreign_key_mappings(cls):
 """Get a mapping of foreign name to the local name of foreign keys"""

        parent_rel = cls.__mapper__.relationships.get(cls.export_parent)
        if parent_rel:
            return {l.name: r.name for (l, r) in parent_rel.local_remote_pairs}
        return {}