@java.lang.Override
  public boolean containsLabels(java.lang.String key) {
    if (key == null) {
      throw new NullPointerException("map key");
    }
    return internalGetLabels().getMap().containsKey(key);
  }
<pre>
Optional.
[Labels](https://cloud.google.com/workstations/docs/label-resources) that
are applied to the workstation configuration and that are also propagated
to the underlying Compute Engine resources.
</pre>

<code>map&lt;string, string&gt; labels = 18 [(.google.api.field_behavior) = OPTIONAL];</code>
java-workstations/proto-google-cloud-workstations-v1beta/src/main/java/com/google/cloud/workstations/v1beta/WorkstationConfig.java