namespace C5
{
  public class HashedArrayList[T]
  {
    public Test () :  void
    {
       _ = HashSet ( KeyValuePairHasher ());
    }
  }

  public class HashSet[T]
  {
    public this (_itemhasher : IHasher[T])
    { }
  }

  public interface IHasher[T]
  {
  }

  public struct KeyValuePair[K,V]
  {
  }

  public sealed class KeyValuePairHasher[K,V]: IHasher[KeyValuePair[K,V]]
  {
  }
}

class X
{
  static Main () :  void
  { }
}
/*
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*/