Function cursive::view::scroll::important_area

pub fn important_area<T, ImportantArea>(
    scroller: &T, 
    size: XY<usize>, 
    important_area: ImportantArea
) -> Rect where
    T: Scroller,
    ImportantArea: FnMut(&T, XY<usize>) -> Rect, 

Performs View::important_area on a scroll::Scroller.