PR Checklist:

Have you run the unit, integration and smoke tests as described here?
If you added public APIs, did you write the JavaDocs/kdocs?
If the changes are of interest to application developers, have you added them to the changelog, and potentially the release notes (https://docs.r3.com/en/platform/corda/4.8/open-source/release-notes.html)?
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Thanks for your code, it's appreciated! :)