/// <summary>
/// Adds a list of letters to this transition.
/// </summary>
/// <param name="letters">a list of letters</param>
public void AddAllLetters(IEnumerable <string> letters)
{
Item2.AddRange(letters);
}
/// <summary>
/// Adds a list of letters to this transition.
/// </summary>
/// <param name="letters">a list of letters</param>
public void AddAllLetters(IEnumerable <string> letters)
{
Item2.AddRange(letters);
}