private T GetById <T>(Guid id) where T : Aggregate
{
var raw = _events.ContainsKey(typeof(T)) ?
_events[typeof(T)].Where(e => e.AggregateId == id) :
new List <EventData>().AsEnumerable();
var events = raw.Select(x => x.DeserializeEvent());
var aggregate = _aggregateFactory.Hydrate <T>(_bus, events);
return(aggregate);
}