@Test
	public void testAsMapDescendingMap() {
		assertEquals(Direction.BACKWARD, map.descendingMap().direction);
		assertEquals(Direction.FORWARD, map.descendingMap().descendingMap().direction);
	}
This exists to verify behavior in {@link #testAsValuesSubIterator()}
Ghidra/Debug/ProposedUtils/src/test/java/ghidra/util/database/DBCachedObjectStoreTest.java