src/server/pkg/collection/transaction.go
func (s *stmReadCommitted) commit() *v3.TxnResponse {
	s.rset = nil
	return s.stm.commit()
}
func (s *stmReadCommitted) commit() *v3.TxnResponse {
	s.rset = nil
	return s.stm.commit()
}
// commit always goes through when read committed