@Nullable
    public static <T extends Fragment> T findById(Activity a, @IdRes int id) {
        return findById(a.getFragmentManager(), id);
    }
@Nullable
    public static <T extends Fragment> T findById(Activity a, @IdRes int id) {
        return findById(a.getFragmentManager(), id);
    }
@ Nullable public static < T extends Fragment > T findById ( Activity a , @ IdRes int id ) { return findById ( a . getFragmentManager ( ) , id ) ; }
Get the Fragment with the ID.

@return null if the Fragment isn't found
@since 4.0.0
Get the Fragment with the ID .