@java.lang.Override
      public boolean hasModelName() {
        return ((bitField0_ & 0x00000001) != 0);
      }
<pre>
Optional. The model name of the rank service.
Format: `semantic-ranker-512&#64;latest`
</pre>

<code>optional string model_name = 1 [(.google.api.field_behavior) = OPTIONAL];</code>

@return Whether the modelName field is set.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/RagRetrievalConfig.java