const mixinafFormBean::ErrorSkin
afFormBean::ErrorSkin
Implement to define a renderer for form errors.
To use your skin, define it as a service of type ErrorSkin:
static Void defineServices(ServiceDefinitions defs) {
    defs.add(ErrorSkin#, MyErrorSkin#)
}
The default error skin renders the following HTML:
<div class='formBean-errors'>
    <div class='formBean-banner'>#BANNER</div>
    <ul>
        <li> Error 1 </li>
        <li> Error 2 </li>
    </ul>
</div>
To change the banner message, set a message with the key errors.<beanType.name>.banner or errors.banner.