private LayoutLocation(String id, Type locType, double latOrY, double longOrX) {
        this.id = id;
        this.latOrY = latOrY;
        this.longOrX = longOrX;
        this.locType = locType;
    }
@Test(expected = NullPointerException.class)
    public void nullId() {
        layoutLocation(null, Type.GRID, PI, PI);
    }