how to mute pfft~ by mute~?

Dear users,

I know how to easily mute the synth by poly~ and many synth.
However, I have problem with the synth by pfft~.
I have a cluster of gizmo pitch shift.
I have no success mute them.
Due to GUI, I cannot encapsulate them in a poly~.
Can anyone help me?

best,
prko