public final boolean isScrollable(@NonNull final Area area) {
        return topScrollableArea != null && topScrollableArea.getIndex() <= area.getIndex() &&
                bottomScrollableArea.getIndex() >= area.getIndex();
    }
public final boolean isScrollable ( @ NonNull final Area area ) { return topScrollableArea != null && topScrollableArea . getIndex ( ) <= area . getIndex ( ) && bottomScrollableArea . getIndex ( ) >= area . getIndex ( ) ; }
Returns, whether a specific area is scrollable.

@param area
The area, which should be checked, as a value of the enum {@link Area}. The area may
not be null
@return True, if the given area is scrollable, false otherwise