@Test
	public void testSetNoFunctions() throws Exception {
		model = new AnyToAnyFunctionComparisonModel(new HashSet<>());
		assertTrue(model.isEmpty());
		assertEquals(0, model.getFunctions(LEFT).size());
		assertEquals(0, model.getFunctions(RIGHT).size());
		assertNull(model.getActiveFunction(LEFT));
		assertNull(model.getActiveFunction(RIGHT));
	}
Tests the comparison API for using default function comparison model. Each test verifies that
the underlying data model looks correct following a particular API method 
call. There are a few tests that also exercise various features of the data
model directly.
<ul>
<li>The API methods being tested: {@link FunctionComparisonService}</li>
<li>The model being used for verification: {@link AnyToAnyFunctionComparisonModel}</li>
</ul>
Ghidra/Features/Base/src/test/java/ghidra/features/base/codecompare/model/AnyToAnyFunctionComparisonModelTest.java