void SetAsPreviousValue ( const [FNiagaraVariableAttributeBinding](API\Plugins\Niagara\FNiagaraVariableAttributeBinding) & Src, const [FVersionedNiagaraEmitter](API\Plugins\Niagara\FVersionedNiagaraEmitter) & InEmitter, [ENiagaraRendererSourceDataMode](API\Plugins\Niagara\ENiagaraRendererSourceDataMode) InSourceMode )