@Test
    public void shouldEvalScriptWithMapBindingsAndLanguageThenTransform() throws Exception {
        final GremlinExecutor gremlinExecutor = GremlinExecutor.build().create();
        final Map<String,Object> b = new HashMap<>();
        b.put("x", 1);
        assertEquals(4, gremlinExecutor.eval("1+x", "gremlin-groovy", b, r -> (int) r * 2).get());
        gremlinExecutor.close();
    }
Temporary "useless" plugin definition to force GremlinExecutor to use GremlinScriptEngineManager - will be
removed when the old functionality of ScriptEngines is removed.
gremlin-groovy/src/test/java/org/apache/tinkerpop/gremlin/groovy/engine/GremlinExecutorTest.java