static [TArray](API\Runtime\Core\Containers\TArray)< [FNiagaraVariable](API\Plugins\Niagara\FNiagaraVariable) > GetMissingVariables ( [UNiagaraRendererProperties](API\Plugins\Niagara\UNiagaraRendererProperties) * RendererProperties, const [FVersionedNiagaraEmitterData](API\Plugins\Niagara\FVersionedNiagaraEmitterData) * EmitterData )