http://hl7.org/fhir/StructureDefinition/valueset-toocostly|4.0.1

Marks that the expansion is incomplete, because the full value set is too large to represent, and the client asked for an incomplete fragment.
typedestination
baseDefinitionhttp://hl7.org/fhir/StructureDefinition/Extension
typehttp://hl7.org/fhir/StructureDefinition/Extension
Extension.value[x].typehttp://hl7.org/fhir/StructureDefinition/boolean