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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 store_fw_db(self, tenant_id, net, subnet_dict, direc):
 """Calls the service object routine to commit the FW entry to DB. """

        serv_obj = self.get_service_obj(tenant_id)
        sub = subnet_dict.get('allocation_pools')[0].get('start')
        serv_obj.update_fw_local_cache(net, direc, sub)
        serv_obj.commit_fw_db()