@Test
    public void shouldCallAsSupplier() {
        // Supplier.get
        final ScriptEngineLambda lambda = newLambda("11");
        assertEquals(11, lambda.get());
    }
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/jsr223/ScriptEngineLambdaTest.java