public Builder clearExternalIp() {
      externalIp_ = getDefaultInstance().getExternalIp();
      bitField0_ = (bitField0_ & ~0x00000001);
      onChanged();
      return this;
    }
<pre>
Output only. An external IP address associated with the TPU worker.
</pre>

<code>string external_ip = 1 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>

@return This builder for chaining.
java-tpu/proto-google-cloud-tpu-v2/src/main/java/com/google/cloud/tpu/v2/AccessConfig.java