I have a CustomScrollView inside a NestedScrollView. The NestedScrollView has an attached ScrollController. The maxScrollExtent property of the ScrollController is only 100 pixels or so, which is the height of the header (i.e., the outer scroll). This prevents me from being able to use the ScrollController to scroll the CustomScrollView (i.e., inner scroll) all the way down to the bottom.

After digging around, it appears that it's not possible to attach a second ScrollController to the CustomScrollView since it breaks the NestedScrollView's ability to control it.

Is there a suggested alternative or a workaround for controlling the scroll position of a NestedScrollView, so that we can include the inner CustomScrollView and scroll it all the way down to the bottom?