MobileScrollableArea scroll position

I’m not seeing any way to detect a change in a MobileScrollableArea’s contents being scrolled.
I’d like to be able to show an indicator of which page the contents are on, and have it update as a user swipes through the control.
Is this possible?

It is not possible out of the box.

I wrote some delegate declares for this and have a custom scrollable area subclass that handles this.
How urgent is this for you? (I’m currently on vacation)

Not urgent at all.
I can figure out a way to do it. I was just hoping for an out-of-the-box method.