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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 delete_fabric_fw(self, tenant_id, fw_dict, is_fw_virt, result):
 """Top level routine to unconfigure the fabric. """

        try:
            with self.mutex_lock:
                ret = self.delete_fabric_fw_internal(tenant_id, fw_dict,
                                                     is_fw_virt, result)
        except Exception as exc:
            LOG.error("Exception raised in delete fabric %s", str(exc))
            return False
        return ret