tree a2141f211ee1e01f70e35fc351ab4b487f9def88
parent 4832e4792b28c92466fdb7e7ca5446ddf9fdb524
author Gary Gregory <garydgregory@gmail.com> 1610851150 -0500
committer Gary Gregory <garydgregory@gmail.com> 1610851150 -0500

Use isEmpty().