@Nullable
    public static <T extends Fragment> T findById(Fragment frag, @IdRes int id) {
        return findById(frag.getFragmentManager(), id);
    }
@Nullable
    public static <T extends Fragment> T findById(Fragment frag, @IdRes int id) {
        return findById(frag.getFragmentManager(), id);
    }
@ Nullable public static < T extends Fragment > T findById ( Fragment frag , @ IdRes int id ) { return findById ( frag . 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 .