@Test
    public void shouldCallAsFunction() {
        // Function.apply
        final ScriptEngineLambda lambda = newLambda("1+a");
        assertEquals(11, Integer.parseInt(lambda.apply(10).toString()));
    }
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/jsr223/ScriptEngineLambdaTest.java