How do you add a HTTP Header within HS.FHIRServer.Interop.HTTPOperation business operation?
I have an interoperability production that functions as a FHIR proxy. I have a need to add an HTTP Header value to the outbound request. I've subclassed HS.FHIRServer.Interop.HTTPOperation, but I cannot find a way to add an HTTP Header to the request. The HTTP class used in HS.FHIRServer.Interop.HTTPOperation is HS.FHIRServer.RestClient.HTTP. That RestClient class does not seem to expose or allow modification of the actual HttpRequest.
I'm used to using %Net.HttpRequest and doing a request.SetHeader(key, value) - but that isn't available - or I can't find it - when using HS.FHIRServer.Interop.HTTPOperation.
I'm practically certain this can be done. What am I overlooking?