/// <summary>
/// Initializes a new instance of Permutations class.
/// </summary>
/// <param name="sequence">Sequence of items to use for permutations.</param>
/// <param name="comparer">Comparer to use for item comparison.</param>
public Permutations(IList <T> sequence, IComparer <T> comparer)
{
_enumerator = new PermutationEnumerator <T>(sequence, comparer);
}
/// <summary>
/// Initializes a new instance of Permutations class.
/// </summary>
/// <param name="sequence">Sequence of items to use for permutations.</param>
public Permutations(IList <T> sequence)
{
_enumerator = new PermutationEnumerator <T>(sequence);
}
