Behavior Tree to EQS blackboard key

Hello all. I have a custom generator for EQS, and I have a blackboard key, its ENUM of item that AI looking for. Im looking a way how I can say to my generator to return only objects with equal to that dynamic blackboard key ENUM variable. For that I need to feed that blackboard to my generator but just can’t find a way. I found that nice stream “Making AI” where Miazko (sorry if i misspell it) show how to do something close to it, but im totaly noob in c++.
So is there a way to make it in blueprint or is there a plans for this feature in coming versions of engine?