Some tests I've done involving `this` scopes and `function` object properties.

function-properties-scope-tests.js

function Foo() {
	this.bar = "foo";
}

Foo.prototype.use = (function (_instance, _name) {
	return Object.assign(function use() {
		// console.log("false: ", _fn.hello);
		// console.log("false: ", _fn.aBar);
		console.log("true: ", _instance.bar);
		console.log("true: ", this.use.hello);
		console.log("true: ", this[_name].hello);
		console.log("true: ", use.aBar);
		console.log("false: ", this.bar);
		console.log("is Foo: ", Object.getPrototypeOf(this));
	}, {
		hello: "world!",
		aBar: this.bar, // !!!
		// Both give an error!
		// helloWithin: this["use"]["hello"] || _instance[_name]["hello"]
	});
})(this, "use");

Foo.prototype.baz = function baz() {
	return "help";
}

var foo = new Foo();
foo.use();
console.log(foo.bar);
console.log(Object.getOwnPropertyNames(foo));
console.log(foo.use.hello);
console.log(foo.use.aBar);
// console.log(foo.use.helloWithin);