CQL Has Code in ValueSet issue

[SeenaFa]

The issue I'm encountering is that I'm getting a false value but should be getting true when checking if a code is in a ValueSet or not.

What I'm trying to do is check an Observation.code against the ValueSet via a function call. The function calls/uses fluent functions to do the check. I tried breaking down each step of the function calls to see if I can isolate the problem but was unable to.
I found that when I call the fluent function(s) directly, I get a "null" value and not sure why that is. Below is a snippet of the CQL but have also attached a zip file containing the CQL library and test case.

`library IssueObservationCode

using FHIR version '4.0.1'

include FHIRHelpers version '4.0.1' called FHIRHelpers
include IssueExpandValueSet_Concepts called Concepts

context Patient

define "ObservationsList": [Observation]

define "Observations Garb": [Observation: Concepts."Garb"]

define "test function": "Has garb"("ObservationsList")

define "test fluent": "ObservationsList"."Obs garb during"()

define "test fluent has": "ObservationsList"[0].code."Has"(Concepts."Garb" as System.ValueSet)

define function "Has garb"(obs List):
exists(obs."Obs garb during"())

define fluent function "Obs garb during"(observations List<FHIR.Observation>):
observations
."With any code"(Concepts."Garb" as System.ValueSet)

define fluent function "With any code"(observations List<FHIR.Observation>, codes List<System.Code>):
if observations is null or codes is null then null
else
(observations) observation
where observation.code."Has"(codes)

define fluent function "Has"(codeableConcept FHIR.CodeableConcept, codes List<System.Code>):
if codeableConcept is null or codes is null then null
else
exists(
(codeableConcept.coding) coding
where coding in codes
)`

IssueObservationCode.zip

[antvaset]

Hi @SeenaFa, I can replicate this issue using the latest version of the extension, and it's related to #1407 (which we fixed in #1409).

The issue had to do with the imported valueset being expanded prematurely during execution. Only external valuesets were affected and not the ones defined in the library. So if I bring valueset "Garb": 'garb' into the IssueObservationCode library and re-run the CQL, I get

Patient=Patient(id=Patient1)
ObservationsList=[Observation(id=lead-observation-1)]
Observations Garb=[Observation(id=lead-observation-1)]
test function=true
test fluent=[Observation(id=lead-observation-1)]
test fluent has=true

as expected.

Once the extension is updated, external valuesets should work as intended.