{description: Expiry date of package or container of substance, package_name: hl7.fhir.r6.core, name: expiry, type: date, package_version: 6.0.0-ballot4, class: unknown, kind: null, url: 'http://hl7.org/fhir/SearchParameter/Substance-expiry', version: 6.0.0-ballot4}