public static Builder newBuilder() {
      return DEFAULT_INSTANCE.toBuilder();
    }
<pre>
The default value for the attribute.
</pre>

<code>.google.cloud.visionai.v1.AttributeValue default_value = 3;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/OperatorDefinition.java