[TOptional](API\Runtime\Core\IO\TOptional)< [FDropRequestResponse](API\Plugins\NiagaraEditor\ViewModels\Stack\UNiagaraStackEntry\FDropRequestResp-) > CanDrop ( const [FDropRequest](API\Plugins\NiagaraEditor\ViewModels\Stack\UNiagaraStackEntry\FDropRequest) & DropRequest )