@Override
    public void onNestedVerticalPreScroll(CoordinatorLayout coordinatorLayout, V child, View target, int dx, int dy, int[] consumed, @ScrollDirection int scrollDirection) {
//        handleDirection(child, scrollDirection);
    }
Class description

@author ashokvarma
@version 1.0
@see VerticalScrollingBehavior
@since 25 Mar 2016
common/src/main/java/com/sxjs/common/widget/bottomnavigation/behaviour/BottomVerticalScrollBehavior.java