if (name == null) {
            throw new ScriptEngineException("Script engine name parameter is null. A valid script engine name must be provided.");
        }
        final ScriptEngine scriptEngine = scriptEngineMap.get(name.toLowerCase(Locale.ROOT));
        if (scriptEngine != null) {
            return scriptEngine;
        }
        throw new ScriptEngineException(name + " is not found.");
    }