public java.lang.String getEtag() {
      java.lang.Object ref = etag_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        etag_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
<pre>
Optional. Checksum used to ensure that the user-provided value is up to
date before the server processes the request. The server compares provided
checksum with the current checksum of the resource. If the user-provided
value is out of date, this request returns an `ABORTED` error.
</pre>

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

@return The etag.
java-vmwareengine/proto-google-cloud-vmwareengine-v1/src/main/java/com/google/cloud/vmwareengine/v1/DeleteVmwareEngineNetworkRequest.java