Do not rely on notifiction module being imported
This has worked so far mostly by accident, but it turned out to be
brittle while writing tests. This makes sure that the notification
module is always imported before use.
{% comment %}
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
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Unless required by applicable law or agreed to in writing, software
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{% endcomment %}
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
<html lang="en">
<head>
<title>404 Not Found</title>
</head>
<body><h1>404 Not Found</h1></body>
</html>