http://hl7.org/fhir/StructureDefinition/elementdefinition-suppress|5.2.0

If the extension is present on one of the named properties in a differential, the element property should be removed from the the corresponding snapshot.element during snapshot generation.
Base: http://hl7.org/fhir/StructureDefinition/Extension4.0.1, 5.0.0, 4.0.1
Type: Extension (a.k.a: http://hl7.org/fhir/StructureDefinition/Extension)
Type dependencies: 0
Elements