public static Builder newBuilder() {
    return DEFAULT_INSTANCE.toBuilder();
  }
<pre>
Output only. The batch ID.
</pre>

<code>string batch_id = 4 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>

@return The bytes for batchId.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/BatchRunProcessRequest.java