[Closed] need little help with trackbar filter

I’m tring to filter only the key from my CA stored inside an attribute holder but I cant get the custrom attributes key to show up

so I got this to work on a regular modifier (bend modifier):

fn testCallbackFilterFunction theAnimatable theParent theSubAnimIndex theGrandParent theNode=(
      superClassof theAnimatable == FloatController and theGrandParent == (modPanel.getCurrentObject())
)

fn testCallbackAdditionFunction arg1 arg2 = (true)
theInterface = maxOps.trackbar
theIndex = theInterface.registerFilter testCallbackFilterFunction callbackAdditionFunction "FilterModifier" 8 active:true stopTraversal:false

but that doesnt work with my attribute holder I tried hooking up the classof and the superClassOf of theGrandParent and compare that to the input im getting from the format command ( EmptyModifier and modifier)but that still wont work, they wont show up