title: When I must create async stub <GRPC>?
body: <pre><code>ManagedChannel managedChannel = ManagedChannelBuilder.forAddress(&quot;localhost&quot;, 8888).usePlaintext().build();
  Grpc.Stub stub = CLIGrpc.newStub(managedChannel);
  </code></pre>
  <p>When I must create stub? When every method being called or only once?</p>