How can I add effects to a childsynths in script?

[pesto]

Hi, I am trying to add effects to my childsynths in onInit-script.

// works on the master
Synth.addEffect('Limiter', 'Limiter1', -1);

// fails on the child
const var Looper1 = Synth.getChildSynth('Looper1'); // Returns childsynth NOT synth!
Looper1.addEffect('Limiter', 'Limiter1', -1); 

How can I realise this?