private ELResolver createElResolver() {
CompositeELResolver compositeResolver = new CompositeELResolver();
compositeResolver.add(new ArrayELResolver());
compositeResolver.add(new ListELResolver());
compositeResolver.add(new MapELResolver());
compositeResolver.add(new ResourceBundleELResolver());
compositeResolver.add(new DynamicBeanPropertyELResolver(ItemInstance.class, "getFieldValue", "setFieldValue"));
compositeResolver.add(new BeanELResolver());
return new SimpleResolver(compositeResolver);
}