void Initialize ( [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [FNiagaraSystemViewModel](API\Plugins\NiagaraEditor\ViewModels\FNiagaraSystemViewModel) > InOwningSystemViewModel, int32 InEmitterHandleIndex, [TWeakPtr](API\Runtime\Core\Templates\TWeakPtr)< [FNiagaraEmitterInstance](API\Plugins\Niagara\FNiagaraEmitterInstance), ESPMode::ThreadSafe > InSimulation )