<code>ApplicationInstance</code> can also serve as a registry. Instance-level
registrations are useful for providing instance-level customizations, such as
A/B testing of a feature.</em></p>
</blockquote>
<h2 id="toc_factory-registrations">Factory Registrations <a href="#toc_factory-registrations"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512">
        <path d="M326.61 185.4c59.75 59.8 58.93 155.69.36 214.58-.1.12-.24.25-.36.37l-67.2 67.2c-59.27 59.27-155.7 59.26-214.96 0-59.27-59.26-59.27-15