Update Declaration from Declaration Message - xsl example

Summary:

Could anyone please share a basic XSL that can be used to perform action 'Update Declaration' from Declaration message? It doesnt seem to be documented and it`s difficult to understand what should be the outcome of the transformation. Declaration XML ?

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Version (include the version you are using, if applicable):

23C

Code Snippet (add any code snippets that support your topic, if applicable):

Any mockup xsl that would produce valid xml for this action. Just to get understanding of what is expected here. We could then take the xsl code on our own.