I am de-serialzing a FHIR Resource CodeSystem in STU3 FHIR resources from JSON in my Business Process using the following code:
set pCodeSystemResource = ##class(HS.FHIR.vSTU3.Model.Resource.CodeSystem).%New()
set tStream = ##class(HS.SDA3.QuickStream).%OpenId(pFHIRRequest.QuickStreamId)
if $IsObject(tStream) {
set tSC = ##class(HS.FHIR.Utils).FHIRToHSFHIR(pFHIRRequest.ContentType, tStream, .pCodeSystemResource, "HS.FHIR.vSTU3.Model.
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