@java.lang.Override
  public Builder toBuilder() {
    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
  }
<pre>
Model to use for the feature.
Supported values: "builtin/stable" (the default if unset) and
"builtin/latest". `DOCUMENT_TEXT_DETECTION` and `TEXT_DETECTION` also
support "builtin/weekly" for the bleeding edge release updated weekly.
</pre>

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

@return The bytes for model.
java-vision/proto-google-cloud-vision-v1/src/main/java/com/google/cloud/vision/v1/Feature.java