<p>The value must match the name of the available adapter Mixer is built with. An adapter&rsquo;s name is typically a
constant in its code.</p></td></tr><tr id=Handler-adapter><td><code>adapter</code></td><td><code>string</code></td><td><p>Required. The name of a specific adapter implementation. For referencing compiled-in
adapters, use the <code>compiled_adapter</code> field instead.</p><p>An adapter&rsquo;s implementation name is typically a constant in its code.</p></td></tr><tr id=Handler-params><td><co