public CompositeActor(IActor[] actors, IStructSizeCounter counter, Func<Type, int> messageIdGetter)
{
if (actors.Length > MaxActors)
{
throw new ArgumentException($"Too many actors. Can composite only up to {MaxActors}");
}
var messageTypes = actors.Select(a => new ActorDescriptor(a))
.SelectMany(descriptor => descriptor.HandledMessageTypes)
.Distinct()
.ToArray();
Descriptor = new ActorDescriptor(messageTypes);
_readers = actors.Select(a => new MessageReader(a, counter, messageIdGetter)).ToArray();
_count = _readers.Length;
_messageMap = BuildMessageMap(actors, messageIdGetter);
_batchAware = actors.OfType<IBatchAware>().ToArray();
}