public static com.google.cloud.tpu.v1.Symptom getDefaultInstance() {
    return DEFAULT_INSTANCE;
  }
<pre>
A string used to uniquely distinguish a worker within a TPU node.
</pre>

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

@param value The bytes for workerId to set.
@return This builder for chaining.
java-tpu/proto-google-cloud-tpu-v1/src/main/java/com/google/cloud/tpu/v1/Symptom.java