yui/yui3 — comment on commit a7e9ca67d735ae1bcdc1f7deb35ab98dd9c9f614
File: src/button/js/group.js line 38
By ericf:

This doesn't seem to be needed. Calling `get('contentBox')` will cause the `contentBox` to be created during initialization, when it can be deferred until render-time.