{description: Optional Extensions Element, package_name: hl7.fhir.uv.extensions.r4b, name: Keyword, type: string, package_version: 5.3.0-ballot-tc, class: unknown, kind: null, url: 'http://hl7.org/fhir/SearchParameter/codesystem-extensions-CodeSystem-keyword', version: 5.3.0-ballot-tc}