private async Task InitializeFields(IEnumerable <SkillNode> skillNodes)
{
_gameData.PassiveNodes = skillNodes;
var computationFactory = new ComputationFactory(GameData);
var calculator = computationFactory.CreateCalculator();
_builderFactories = await computationFactory.CreateBuilderFactoriesAsync();
_parser = await computationFactory.CreateParserAsync();
_schedulers = new ComputationSchedulerProvider();
_observables = new ComputationObservables(_parser);
_calculator = new ObservableCalculator(calculator, _schedulers.CalculationThread);
}