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 computed by the server. May be sent on update and delete
requests to make sure that the client has an up-to-date value before
proceeding.
</pre>

<code>string etag = 9 [(.google.api.field_behavior) = OPTIONAL];</code>

@return The etag.
java-workstations/proto-google-cloud-workstations-v1/src/main/java/com/google/cloud/workstations/v1/WorkstationConfig.java