public Builder setWorkerId(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      workerId_ = value;
      bitField0_ |= 0x00000008;
      onChanged();
      return this;
    }
<pre>
A string used to uniquely distinguish a worker within a TPU node.
</pre>

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

@param value The workerId to set.
@return This builder for chaining.
java-tpu/proto-google-cloud-tpu-v2alpha1/src/main/java/com/google/cloud/tpu/v2alpha1/Symptom.java