class CoordinatorLayout extends ViewGroup implements NestedScrollingParent2 {

    @Override
    protected LayoutParams generateDefaultLayoutParams() {
        return new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
    }

    public  CoordinatorLayout(@NonNull Context context);
    public  CoordinatorLayout(@NonNull Context context, @Nullable AttributeSet attrs);
    public  CoordinatorLayout(@NonNull Context context, @Nullable AttributeSet attrs,
            @AttrRes int defStyleAttr);

}