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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_backup_class(cls):
 """Return true if given class supports back up. Currently this means a gludb.data.Storable-derived class that has a mapping as defined in gludb.config"""

    return True if (
        isclass(cls) and
        issubclass(cls, Storable) and
        get_mapping(cls, no_mapping_ok=True)
    ) else False