@Override
    public FeatureRange clone() throws CloneNotSupportedException {
        return (FeatureRange)super.clone();
    }
@Test
    void requireThatCloneIsImplemented() throws CloneNotSupportedException {
        FeatureRange node1 = new FeatureRange("foo", 6L, 9L);
        FeatureRange node2 = node1.clone();
        assertEquals(node1, node2);
        assertNotSame(node1, node2);
    }