nested wait.for calls

nested-waitfor.js

var wait = require('wait.for');

function g(callback) {
	setImmediate(function () {
		callback(null, 'G');
	});
}

function f(callback) {
	var res_g = wait.for(g);
	setImmediate(function () {
		callback(null, 'F' + res_g);
	});
}

wait.launchFiber(function () {
	var res_f = wait.for(f);
	console.log('alleged result of f(): ' + res_f);
});