I'm sorry, but I don't see why/how they would be sent to `map` immediately, given where the parenthesis are in the above code snippet. `Promise.prototype.map`

I'm sorry, but I don't see why/how they would be sent to `map` immediately, given where the parenthesis are in the above code snippet. `Promise.prototype.map` isn't a builtin function is it? If the `map` call was inside the invocation of `Promise.all` then I could see it, but perhaps I am missing something.