bool AttemptCalculateTransientAggregatorMagnitudeWithBase ( const [FGameplayTag](API\Runtime\GameplayTags\FGameplayTag) & InAggregatorIdentifier, const [FAggregatorEvaluateParameters](API\Plugins\GameplayAbilities\FAggregatorEvaluateParameters) & InEvalParams, float InBaseValue, float & OutMagnitude ) const