File sub = new File(file.getParentFile(), "sub");
assertTrue(sub.mkdir());
File tmp = new File(sub, file.getName());
assertTrue(file.renameTo(tmp));
JavaFile javaFile = helper.assertJavaSource("metamodel.controller.sub.A");
javaFile.assertCompilationUnit().getPackage().setName(ASTHelper.createNameExpr("metamodel.controller.sub"));
javaFile.assertSave();
//
helper.assertCompile();
mm = (ModuleMetaModel)Tools.unserialize(MetaModelState.class, ser).metaModel;