 in order to reduce systemic complexity, eliminating policy logic from service code and giving control to operators instead.</p><figure><img style="max-width:60%;" src="./img/mixer/traffic.svg" alt="Showing the flow of traffic through Mixer." title="Mixer Traffic Flow" /><figcaption>Mixer Traffic Flow</figcaption></figure><p>Mixer provides three core features:</p><ul><li><p><strong>Precondition Checking</strong>. Enables callers to verify a number of preconditions before responding to an incoming request fr