public EntityDictionary(IEnumerable <Entity> ents)
{
NameToEntity = ImmutableDictionary <string, Entity> .Empty.ToBuilder();
NameToEntity.AddRange(ents.ToDictionary(e => e.Name));
PosToName = ImmutableDictionary <Position, string> .Empty.ToBuilder();
PosToName.AddRange(NameToEntity.ToDictionary(kv => kv.Value.Pos, kv => kv.Key));
}
