IoCore { public static Io.Builder<GraphSONIo> graphson() { return GraphSONIo.build(); } private  IoCore(); static Io.Builder<GraphMLIo> graphml(); static Io.Builder<GraphSONIo> graphson(); static Io.Builder<GryoIo> gryo(); static Io.Builder createIoBuilder(final String graphFormat);  }
@Test public void shouldCreateAnIoBuilderforGraphSON() { assertThat(IoCore.graphson(), instanceOf(GraphSONIo.Builder.class)); }