/// <summary>
/// The Key.
/// </summary>
/// <typeparam name="V">.</typeparam>
/// <param name="obj">The obj<see cref="IUnique{V}"/>.</param>
/// <returns>The <see cref="UInt64"/>.</returns>
public virtual UInt64 Key <V>(IUnique <V> obj)
{
return(obj.UniquesAsKey());
}
/// <summary>
/// The Key.
/// </summary>
/// <typeparam name="V">.</typeparam>
/// <param name="obj">The obj<see cref="IUnique{V}"/>.</param>
/// <returns>The <see cref="UInt64"/>.</returns>
public override UInt64 Key <V>(IUnique <V> obj)
{
return(obj.UniquesAsKey());
}