Github user robertrbruno commented on the issue:
https://github.com/apache/nifi/pull/2501
Gave your addition a quick look. You should be fine, but I believe
unnecessary since the writevalue function will never be called when the value
is "null" due to the continue statement that happen when a null is found.
Again will not hurt though. Double check my logic for sure. I wrestled with
that for a bit as well.---
