NIFIREG-416 - fix documentation for hooks with class definition

[pvillard31]

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Enables X functionality; fixes bug NIFIREG-YYYY.

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[andrewmlim]

LGTM +1 !

[pvillard31]

Do you want to merge this pull request @andrewmlim ? Or do you want me to do it?

[andrewmlim]

I'll go ahead and merge.