public Builder clearEtag() {
      etag_ = getDefaultInstance().getEtag();
      bitField0_ = (bitField0_ & ~0x00000004);
      onChanged();
      return this;
    }
<pre>
Optional. If set, the request will be rejected if the latest version of the
workstation on the server does not have this ETag.
</pre>

<code>string etag = 3 [(.google.api.field_behavior) = OPTIONAL];</code>

@return This builder for chaining.
java-workstations/proto-google-cloud-workstations-v1/src/main/java/com/google/cloud/workstations/v1/DeleteWorkstationRequest.java