GravityTurn.StageController.FindBurnedResources C# (CSharp) Method

        public List<int> FindBurnedResources()
        {
            //return new List<int>();
            var activeEngines = vessel.parts.Where(PartIsEngine);
            var engineModules = activeEngines.Select(EnabledEngine);
            var burnedPropellants = engineModules.SelectMany(eng => eng.propellants);
            List<int> propellantIDs = burnedPropellants.Select(prop => prop.id).ToList();

            return propellantIDs;
        }