public int[] get(int intervalRef) {
        assert intervalRef < intervalsList.length;
        return intervalsList[intervalRef];
    }
@Test
    void requireThatEqualIntervalListsReturnsSameReference() {
        PredicateIntervalStore.Builder builder = new PredicateIntervalStore.Builder();
        List<Integer> intervals1 = List.of(0x00010001, 0x00020002);
        List<Integer> intervals2 = List.of(0x00010001, 0x00020002);
        int ref1 = builder.insert(intervals1);
        int ref2 = builder.insert(intervals2);
        PredicateIntervalStore store = builder.build();
        int[] a1 = store.get(ref1);
        int[] a2 = store.get(ref2);
        assertEquals(a1, a2);
    }