static [UWidgetBlueprintExtension](API\Editor\UMGEditor\UWidgetBlueprintExtension) * GetExtension ( const [UWidgetBlueprint](API\Editor\UMGEditor\UWidgetBlueprint) * InWidgetBlueprint, [TSubclassOf](API\Runtime\CoreUObject\Templates\TSubclassOf)< [UWidgetBlueprintExtension](API\Editor\UMGEditor\UWidgetBlueprintExtension) > InExtensionType )