public static String getScriptEngineName(final Class<?> klass) throws InitializationError {
        final ScriptEngineToTest annotation = klass.getAnnotation(ScriptEngineToTest.class);
        if (null == annotation)
            throw new InitializationError(String.format("class '%s' must have a EngineToTest annotation", klass.getName()));
        return annotation.scriptEngineName();
    }
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/jsr223/GremlinScriptEngineSuite.java