public static com.google.cloud.tpu.v1.Symptom parseFrom(java.io.InputStream input)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
  }
<pre>
A string used to uniquely distinguish a worker within a TPU node.
</pre>

<code>string worker_id = 4;</code>

@return The bytes for workerId.
java-tpu/proto-google-cloud-tpu-v1/src/main/java/com/google/cloud/tpu/v1/Symptom.java