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>
Only present when 'model' is present in the request.
'model' is normalized to have a project number.

For example:
If the 'model' field in TranslateDocumentRequest is:
`projects/{project-id}/locations/{location-id}/models/general/nmt` then
`model` here would be normalized to
`projects/{project-number}/locations/{location-id}/models/general/nmt`.
</pre>

<code>string model = 3;</code>

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