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

		List<Long> list = new ArrayList<>(map.subMap(-2L, true, 2L, true).descendingMap().keySet());
		assertEquals(List.of(1L, -1L), list);

		List<Long> rList =
			new ArrayList<>(rMap.subMap(2L, true, -2L, true).descendingMap().keySet());
		assertEquals(List.of(-1L, 1L), rList);
	}
This exists to verify behavior in {@link #testAsValuesSubIterator()}
Ghidra/Debug/ProposedUtils/src/test/java/ghidra/util/database/DBCachedObjectStoreTest.java