Getting FlexPhraser data in Lua


I am new to Halion, so my apologies in advance if I have overlooked this in the documentation:

Is it possible to read/get/receive callbacks for all/individual step settings in the FlexPhraser from a Lua script on the controller side?

I see the ArpData and UsrArpData, these however seem to be c structs in which I do not know what the fields are. Can anyone help me out?