Angerszhuuuu

waiting for @tgravescs back and review this

> I am -1 on this change. it's confusing if this indicates `array(null)` or `null`. In addition, this is related to the public API, e.g., `ArrayType`. > > In addition,...

@tgravescs Seems latest twice GA failed not caused by this pr

> I am -1 on this change. it's confusing if this indicates `array(null)` or `null`. In addition, this is related to the public API, e.g., `ArrayType`. > > In addition,...

Test the failed UT in local, it can success.

ping @dongjoon-hyun The latest GA failed caused by ``` * DONE (miniUI) ERROR: dependency ‘pkgdown’ is not available for package ‘devtools’ * removing ‘/usr/local/lib/R/site-library/devtools’ The downloaded source packages are in...

> Yeah, I am fine with the current approach. Any more suggestions? also ping @cloud-fan

> can you try kicking the tests again? Yea

> can you update the PR title? How about current?

@tgravescs All GA passed now