Add documentation for ControllerHelper methods.
Add documentation for ControllerHelper methods.

ifduyue/sync,aruprakshit/sync,ajb/sync,henare/sync,zuyderleven/render_sync,ifduyue/sync,aruprakshit/sync,zuyderleven/render_sync,ajb/sync,henare/sync,ifduyue/sync,angelim/sync,angelim/sync,angelim/sync,chrismccord/sync,zuyderleven/render_sync,chrismccord/render_sync,ajb/sync,chrismccord/sync,chrismccord/sync,henare/sync,chrismccord/render_sync,chrismccord/render_sync,aruprakshit/sync