According to this documentation: https://developer.moovweb.com/docs/api/core/classes/router_responsewriter.responsewriter.html#setupstreamresponseheader
I should be able to set the surrogate key for proxy pages in the xdn router. When I try to do this error is thrown:
Error: Header “x-xdn-surrogate-key” is reserved and cannot be modified
Is the documentation wrong or is this a bug?