public DisjointSets(DisjointSets <T> otherDisjointSets) : this(otherDisjointSets?.GetSets() ?? throw new ArgumentNullException(nameof(otherDisjointSets)))
{
}
public static bool AreMembersOfTheSameSet <T>(this DisjointSets <T> @this, T x, T y) where T : IEquatable <T>
{
return(@this.FindSet(x).Equals(@this.FindSet(y)));
}