hhvm/hack-hhvm-docs — pull request #269 by Nyholm (2014-07-02 23:19:25+00:00)
Title: Changed Set::removeKey to Set::removeAll

There is not removeKey on the Set.

I changed it to removeAll acoring to [the source](https://github.com/facebook/hhvm/blob/master/hphp/hack/hhi/Set.hhi)