how emit/receive multiple arguments?

[gblok]

const hub = new EventEmitter
const  $ = fromEvent('2STREAM', hub)

// I want to get all the arguments but only the first one comes
const fn = ([foo, bar, baz]) =>{}
runEffects(map(fn, $), scheduler)

hub.emit('2STREAM', 'foo', 'bar', 'baz')