mvcc/backend/batch_tx.go
func (t *batchTx) CommitAndStop() {
	t.Lock()
	t.commit(true)
	t.Unlock()
}
func (t *batchTx) CommitAndStop() {
	t.Lock()
	t.commit(true)
	t.Unlock()
}
// CommitAndStop commits the previous tx and does not create a new one.