 this, Mixer’s configuration model enforces a number of constraints designed to avoid errors. For example, the configuration model uses strong typing to ensure that only meaningful attributes or attribute expressions are used in any given context.</p><h2 id=handlers-configuring-adapters>Handlers: configuring adapters</h2><p>Each adapter that Mixer uses requires some configuration to operate. Typically, adapters need things like the URL to their backend, credentials, caching options, and so forth. Each ada