v2 = """
                public class Source {
                    public void some() {
                        Runnable anon = new Runnable() {
                            @Override
                            public void run() {}
                        };
                        anon.run();
                    }
                }
            """
        ) {
            assertEmptyReport()
        }
    }

    static Stream<Arguments> implementations() {
        SessionSetupHandler anon = new SessionSetupHandler() {
            // no methods to implement (marker interface)
        };
        SessionSetupHandler mock = mock(SessionSetupHandler.class);
        return Stream.of(Arguments.of(anon), Arguments.of(mock));
    }

    @Test
    @DisplayName("Class is a public interface in expected package")