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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 removeReadGroupSet(self, readGroupSet):
 """ Removes the specified readGroupSet from this repository. This performs a cascading removal of all items within this readGroupSet. """

        for readGroupSetRecord in models.Readgroupset.select().where(
                        models.Readgroupset.id == readGroupSet.getId()):
            readGroupSetRecord.delete_instance(recursive=True)