void Initialize ( [FRequiredEntryData](API\Plugins\NiagaraEditor\ViewModels\Stack\UNiagaraStackEntry\FRequiredEntryData) InRequiredEntryData, float InSpacerHeight, [TAttribute](API\Runtime\Core\Misc\TAttribute)< bool > InShouldShowInStack, [FString](API\Runtime\Core\Containers\FString) InOwningStackItemEditorDataKey )