hentication/mtls-migration/>rolled out incrementally</a> without requiring all clients of a service to be updated. This is a critical feature that unblocks adoption in-place by existing production deployments.</p></li><li><p>Mixer now has support for <a href=https://github.com/istio/istio/wiki/Out-Of-Process-gRPC-Adapter-Dev-Guide>developing out-of-process adapters</a>. This will become the default way to extend Mixer over the coming releases and makes building adapters much simpler.</p></li><li><p><a href=