API Reference > presentation-common > PresentationRules > RelatedPropertiesSpecificationNew > handleTargetClassPolymorphically handleTargetClassPolymorphically handleTargetClassPolymorphically: undefined | boolean Should the target class specified in RelatedPropertiesSpecificationNew.propertiesSource be handled polymorphically. This means properties of not only the target class, but also all its subclasses are loaded. note There's a difference between loading properties and instances polymorphically. This attribute only controls polymorphism of properties, while instances are always looked up in a polymorphic fashion. Defined in presentation/common/src/rules/content/modifiers/RelatedPropertiesSpecification.ts Line 135 Last Updated: 13 June, 2024