public java.lang.String getModel() {
      java.lang.Object ref = model_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        model_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
<pre>
Optional. The `model` type requested for this translation.

The format depends on model type:

- AutoML Translation models:
  `projects/{project-number-or-id}/locations/{location-id}/models/{model-id}`

- General (built-in) models:
  `projects/{project-number-or-id}/locations/{location-id}/models/general/nmt`,

- Translation LLM models:
  `projects/{project-number-or-id}/locations/{location-id}/models/general/translation-llm`,

For global (non-regionalized) requests, use `location-id` `global`.
For example,
`projects/{project-number-or-id}/locations/global/models/general/nmt`.

If not provided, the default Google model (NMT) will be used
</pre>

<code>string model = 6 [(.google.api.field_behavior) = OPTIONAL];</code>

@return The model.
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/TranslateTextRequest.java