@SuppressWarnings("ConstantConditions")
    @Override
    public void onLayoutChildren(RecyclerView.Recycler recycler, RecyclerView.State state) {
        super.onLayoutChildren(recycler, state);
        this.center = deriveCenter(gravity, getOrientation(), radius, peekDistance, center);
        setChildOffsets(gravity, getOrientation(), radius, center, peekDistance);
    }
Create a {@link TurnLayoutManager} with default settings for gravity, orientation, and rotation.
turn/src/main/java/cdflynn/android/library/turn/TurnLayoutManager.java