{description: 'Drugs, devices, etc. under study, as a code', package_name: hl7.fhir.r5.search, name: focus-code, type: token, package_version: 5.0.0-draft-final, class: unknown, kind: null, url: 'http://hl7.org/fhir/SearchParameter/ResearchStudy-focus-code', version: 5.0.0-draft-final}