BUG: How do I research a Specific 'bonus' in quest tracker ISSUE #216

[Hentaya]

For instance, I did Iron Docks (heroic) for the first time. Got the quest tracker tracking the 'scenario' with all the bosses to kill. But when it was over, I still had a 'Bonus' I have no idea what it is, and the text doesn't appear anywhere online:



So, I tried looking in nxQuests.lua and saw that it's apparently from C_Scenario.GetBonusSteps(), which I think was added in 6.0.2, but can't find documented. But, sure, whatever.

Is there any easy way to access C_Scenario.GetBonusStepInfo, so I can find out WTF it's talking about?