@Test
    public void shouldFailWithoutUtilitiesPlugin() {
        final Groovysh groovysh = new Groovysh();
        try {
            groovysh.execute("describeGraph(g.class)");
            fail("Utilities were not loaded - this should fail.");
        } catch (Exception ignored) {
        }
    }
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-console/src/test/java/org/apache/tinkerpop/gremlin/console/jsr223/UtilitiesGremlinPluginTest.java