public Task <IMediatorResult <TResult> > ApplyFilters <TMessage, TResult>(
IMediatorHandler <TMessage, TResult> handler, TMessage message,
CancellationToken cancellationToken = default(CancellationToken)) where TMessage : IMessage <TResult>
{
var type = typeof(IEnumerable <>).MakeGenericType(typeof(MediatorFilter));
var filters = ((IEnumerable <MediatorFilter>)_serviceProvider.GetService(type)).Reverse();
MediatorPipeLineDelegate <TResult> next = (msg, token) => handler.Process(message, token);
foreach (MediatorFilter filter in filters)
{
var next1 = next;
next = (msg, token) => filter.Apply(msg, next1, token);
}
return(next(message, cancellationToken));
}