modifierExtension property
May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants.
Type: Extension Path: BackboneElement.modifierExtension Minimum Cardinality: 0 Maximum Cardinality: *
Implementation
FixedList<Extension>? get modifierExtension =>
modifierExtensionField.getValue(_json);