ncreased robustness, flexibility, and to support
rich proxy-side caching and batching for increased performance.</p></li><li><p><strong>New Mixer Adapter Model</strong>. A new adapter composition model makes it easier to extend Mixer by adding whole new classes of adapters via templates. This
new model will serve as the foundational building block for many features in the future. See the
<a href=https://github.com/istio/istio/wiki/Mixer-Compiled-In-Adapter-Dev-Guide>Adapter Developer&rsquo;s Guide</a> to le