@Test
    public void shouldHandlePSingleValue() throws Exception  {
        assumeThat(version, either(startsWith("v2")).or(startsWith("v3")));

        final P o = P.within(1);
        assertEquals(o, serializeDeserialize(mapper, o, P.class));
    }
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/structure/io/graphson/GraphSONMapperEmbeddedTypeTest.java