@Test
	public void testAsKeySetSubLast() {
		DBCachedObjectStoreKeySubSet subSet = keySet.subSet(-2L, true, 2L, true);
		assertNull(subSet.last());
		populateStore(-3, -1, 1, 3);
		assertEquals(1, subSet.last().longValue());
	}
This exists to verify behavior in {@link #testAsValuesSubIterator()}
Ghidra/Debug/ProposedUtils/src/test/java/ghidra/util/database/DBCachedObjectStoreTest.java