[TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FNiagaraEmitterHandleViewModel](API\Plugins\NiagaraEditor\ViewModels\FNiagaraEmitterHandleViewModel) > AddEmitter ( [UNiagaraEmitter](API\Plugins\Niagara\UNiagaraEmitter) & Emitter, [FGuid](API\Runtime\Core\Misc\FGuid) EmitterVersion )