@Override
    protected boolean onPreHandle(ServletRequest request, ServletResponse response, Object mappedValue) {
        // Always return true since we allow access to anyone
        return true;
    }
Always returns <code>true</code> allowing unchecked access to the underlying path or resource.

@return <code>true</code> always, allowing unchecked access to the underlying path or resource.
web/src/main/java/org/apache/shiro/web/filter/authc/AnonymousFilter.java