@Test(expected = IllegalArgumentException.class)
	public void testMixinAlmostOverlap() {
		String resource = "classpath:/DefaultModuleOptionsMetadataResolverTests-modules/source/module4/";
		ModuleDefinition definition = ModuleDefinitions.simple("module4", source, resource);
		metadataResolver.resolve(definition);
	}
This test has the "foo" option almost overlapping: for the same name "foo", two options exist with slightly
different attributes, this is an error.
spring-xd-module/src/test/java/org/springframework/xd/module/options/DefaultModuleOptionsMetadataResolverTests.java