This class is deprecated.
in 2.6 for removal in 3.0. Pending further enhancements, comment edit notifications have been removed.
This notification type will still be dispatched, inside the server, but as of 2.6 it no longer has any
default handlers and will not produce e-mail messages.
(PullRequest pullRequest, Date whenActivityPerformed, StashUser activityPerformer, Comment comment, String previousText)