public Builder clearRevisionCreateTime() {
      bitField0_ = (bitField0_ & ~0x00000040);
      revisionCreateTime_ = null;
      if (revisionCreateTimeBuilder_ != null) {
        revisionCreateTimeBuilder_.dispose();
        revisionCreateTimeBuilder_ = null;
      }
      onChanged();
      return this;
    }
<pre>
Output only. The timestamp for the latest revision of the workflow's
creation.
</pre>

<code>
.google.protobuf.Timestamp revision_create_time = 7 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>
java-workflows/proto-google-cloud-workflows-v1/src/main/java/com/google/cloud/workflows/v1/Workflow.java