That's not a code review. That's either a suggestion that the initial commit is 'wrong' or the reviewer is a jerk. Either way, this is the PM's fault - not enough information to finish it right or too reviewer nitpicky on useless stuff.
Money quote: "Nothing should be surprising to a reviewer in a code review: discuss any significant design decisions before code is written. Code reviews are a time to iron out implementation details, not discuss major design or architecture decisions."