public Builder mergeRevisionCreateTime(com.google.protobuf.Timestamp value) {
      if (revisionCreateTimeBuilder_ == null) {
        if (((bitField0_ & 0x00000040) != 0)
            && revisionCreateTime_ != null
            && revisionCreateTime_ != com.google.protobuf.Timestamp.getDefaultInstance()) {
          getRevisionCreateTimeBuilder().mergeFrom(value);
        } else {
          revisionCreateTime_ = value;
        }
      } else {
        revisionCreateTimeBuilder_.mergeFrom(value);
      }
      if (revisionCreateTime_ != null) {
        bitField0_ |= 0x00000040;
        onChanged();
      }
      return this;
    }
<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