How do you send MessagePort for a proxy to a 2nd Worker thread (so the 2nd worker call 1st Worker directly without having to go through main thread) ?

Main thread:

// create two workers
const aProxy = Comlink.wrap(new "aWorker.js));
const bProxy = Comlink.wrap(new "bWorker.js));

// sent MessagePort of 1st Worker to 2nd Worker

const aPort = await aProxy [ Comlink.createEndpoint ] ();
bProxy.setRemotePort(Comlink.transfer(aPort, [aPort]);

in bWorker:

// 2nd worker tries to call 1st Worker via MesagChannel

setRemotePort(aPort:MessagePort){
this.aProxy = (await Comlink.wrap(aPort));
// test here...
let result = await aProxy.aMethod(param1, param2, ...);
}

Exception thrown in bWorker is:
Uncaught (in promise) TypeError: Cannot read property 'apply' of undefined

It seems MessagePort wasn't property transferred or there is typecasting issue somewhere.