mvcc/backend/batch_tx.go
func (t *batchTx) UnsafePut(bucketName []byte, key []byte, value []byte) {
	t.unsafePut(bucketName, key, value, false)
}
func (t *batchTx) UnsafePut(bucketName []byte, key []byte, value []byte) {
	t.unsafePut(bucketName, key, value, false)
}
func ( t * batchTx ) UnsafePut ( bucketName [ ] byte , key [ ] byte , value [ ] byte ) { t . unsafePut ( bucketName , key , value , false ) }
// UnsafePut must be called holding the lock on the tx.
UnsafePut must be called holding the lock on the tx .