public com.google.cloud.vertexai.api.GenerationConfig.RoutingConfig.AutoRoutingMode.Builder
          getAutoModeBuilder() {
        return getAutoModeFieldBuilder().getBuilder();
      }
<pre>
Automated routing.
</pre>

<code>
.google.cloud.vertexai.v1.GenerationConfig.RoutingConfig.AutoRoutingMode auto_mode = 1;
</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/GenerationConfig.java