normally in houdini folderws one can call:
node.parmTuplesInFolder()

however this seems to be impossible for a multiparm block?
I have tried iterating through them by hand but i cannot seem to find the folder, I tried:
Controls1,
Controls_1,
Controls#1
etc

any pointers ?

>>> p=hou.parm('/obj/null1/blah')
>>>p.multiParmInstances()
(<hou.Parm first1x in /obj/null1>, <hou.Parm first1y in /obj/null1>, <hou.Parm second1x in /obj/null1>, <hou.Parm second1y in /obj/null1>, <ho
u.Parm first2x in /obj/null1>, <hou.Parm first2y in /obj/null1>, <hou.Parm second2x in /obj/null1>, <hou.Parm second2y in /obj/null1>)

Cheers,
Koen