Titanium Alloy: Run a function that exists in a require statement

Question

I have the following code:

index.xml

<Window>
    <View>
        <Require id="foo1" src='foo'>            
    </View>
</Window>

foo.xml

<View>
    <Label>This is from foo</Label>
</View>

foo.js

function doSomething() {
    Ti.API.info('YES!');
}

Question

I want to be able to run the function doSometing() in index.js. How can I do that?

I tried:

$.foo1.doSomething()

But that does not seem to work.

Answer 1

<Window>
    <View>
        <Require id="foo1" src='foo'>            
    </View>
</Window>

In this code, Require id holds the controller of foo.js file, means,

$.foo1 = $ in foo.js

In order to access any property or method from Require, you can attach that property to any view or just export it like this:

foo.js

$.doSomething = function () {
    Ti.API.info('YES!');
}

index.js

$.foo1.doSomething();

In case of above @miga's answer, you need to use this code in index.js :

// view is the id of topmost view to which you attached the method.
$.foo1.view.doSomething();