@java.lang.Override
      public com.google.cloud.vertexai.api.GenerationConfig.RoutingConfig.ManualRoutingModeOrBuilder
          getManualModeOrBuilder() {
        if ((routingConfigCase_ == 2) && (manualModeBuilder_ != null)) {
          return manualModeBuilder_.getMessageOrBuilder();
        } else {
          if (routingConfigCase_ == 2) {
            return (com.google.cloud.vertexai.api.GenerationConfig.RoutingConfig.ManualRoutingMode)
                routingConfig_;
          }
          return com.google.cloud.vertexai.api.GenerationConfig.RoutingConfig.ManualRoutingMode
              .getDefaultInstance();
        }
      }
<pre>
Manual routing.
</pre>

<code>
.google.cloud.vertexai.v1.GenerationConfig.RoutingConfig.ManualRoutingMode manual_mode = 2;
</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/GenerationConfig.java