@Test
    @LoadGraphWith(MODERN)
    public void g_VX1AsStringX_out_hasXid_2AsStringX() {
        final Traversal<Vertex, Vertex> traversal = get_g_VX1X_out_hasIdX2X(convertToVertexId("marko").toString(), convertToVertexId("vadas").toString());
        assertVadasAsOnlyValueReturned(traversal);
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/filter/HasTest.java