{description: The kind of operation to perform as a part of a property based filter., package_name: hl7.fhir.uv.xver-r4.r4b, name: FilterOperator, type: null, package_version: 0.0.1-snapshot-2, class: unknown, kind: null, url: 'http://hl7.org/fhir/filter-operator', version: 4.0.1}