@Test
	public void testSetComment() throws Exception {
		ProgramFragment f = listing.getFragment("MyTree", addr(10));
		assertNull(f.getComment());
		f.setComment("my comment");

		assertEquals("my comment", f.getComment());
		f.setComment(null);
		assertNull(f.getComment());
	}
Test the address iterator starting at a specific address.
Ghidra/Features/Base/src/test.slow/java/ghidra/program/database/module/FragmentTest.java