public com.google.protobuf.TimestampOrBuilder getRevisionCreateTimeOrBuilder() {
      if (revisionCreateTimeBuilder_ != null) {
        return revisionCreateTimeBuilder_.getMessageOrBuilder();
      } else {
        return revisionCreateTime_ == null
            ? com.google.protobuf.Timestamp.getDefaultInstance()
            : revisionCreateTime_;
      }
    }
<pre>
Output only. The timestamp that the latest revision of the workflow
was created.
</pre>

<code>
.google.protobuf.Timestamp revision_create_time = 7 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>
java-workflows/proto-google-cloud-workflows-v1beta/src/main/java/com/google/cloud/workflows/v1beta/Workflow.java