@Override
    public RangeEdgePartition clone() throws CloneNotSupportedException {
        return (RangeEdgePartition)super.clone();
    }
@Test
    void requireThatCloneIsImplemented() throws CloneNotSupportedException {
        RangeEdgePartition node1 = new RangeEdgePartition("foo=10", 10, 0, 0);
        RangeEdgePartition node2 = node1.clone();
        assertEquals(node1, node2);
        assertNotSame(node1, node2);
    }