@Test
    public void shouldCreateAnIoBuilderforGraphSON() {
        assertThat(IoCore.graphson(), instanceOf(GraphSONIo.Builder.class));
    }
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/structure/io/IoCoreTest.java