public static com.google.cloud.workstations.v1.CreateWorkstationClusterRequest parseFrom(
      java.io.InputStream input) throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
  }
<pre>
Optional. If set, validate the request and preview the review, but do not
actually apply it.
</pre>

<code>bool validate_only = 4 [(.google.api.field_behavior) = OPTIONAL];</code>

@return The validateOnly.
java-workstations/proto-google-cloud-workstations-v1/src/main/java/com/google/cloud/workstations/v1/CreateWorkstationClusterRequest.java