#vulnerable code 
                             @Test
	public void rythmEngineTest() {
		// 字符串模板
		TemplateEngine engine = new RythmEngine(new TemplateConfig("templates"));
		Template template = engine.getTemplate("hello,@name");
		String result = template.render(Dict.create().set("name", "hutool"));
		Assert.assertEquals("hello,hutool", result);

		// classpath中获取模板
		Template template2 = engine.getTemplate("rythm_test.tmpl");
		String result2 = template2.render(Dict.create().set("name", "hutool"));
		Assert.assertEquals("hello,hutool", result2);
	} 
                            #location 6 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                             @Test
	public void rythmEngineTest() {
		// 字符串模板
		TemplateEngine engine = TemplateUtil.createEngine(
				new TemplateConfig("templates").setCustomEngine(RythmEngine.class));
		Template template = engine.getTemplate("hello,@name");
		String result = template.render(Dict.create().set("name", "hutool"));
		Assert.assertEquals("hello,hutool", result);

		// classpath中获取模板
		Template template2 = engine.getTemplate("rythm_test.tmpl");
		String result2 = template2.render(Dict.create().set("name", "hutool"));
		Assert.assertEquals("hello,hutool", result2);
	}