@Test
	public void testAsKeySetSubIterator() {
		populateStore(-3, -1, 1, 3);

		assertTrue(IteratorUtils.toList(keySet.subSet(0L, true, 0L, false).iterator()).isEmpty());

		List<Long> list = IteratorUtils.toList(keySet.tailSet(0L, true).iterator());
		assertEquals(List.of(1L, 3L), list);

		List<Long> rList = IteratorUtils.toList(rKeySet.tailSet(0L, true).iterator());
		assertEquals(List.of(-1L, -3L), rList);
	}
This exists to verify behavior in {@link #testAsValuesSubIterator()}
Ghidra/Debug/ProposedUtils/src/test/java/ghidra/util/database/DBCachedObjectStoreTest.java