@java.lang.Override
  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
    Builder builder = new Builder(parent);
    return builder;
  }
<pre>
Output only. System-generated unique identifier for the resource.
</pre>

<code>string uid = 5 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>

@return The bytes for uid.
java-vmwareengine/proto-google-cloud-vmwareengine-v1/src/main/java/com/google/cloud/vmwareengine/v1/HcxActivationKey.java