/// <summary>
/// Statechart constructor.
/// </summary>
/// <param name="entry">Statechart entry state.</param>
/// <param name="states">Enumeration of statechart states (optional).</param>
public Statechart(State entry, IEnumerable <State> states = null)
{
Current = entry;
if (states != null)
{
States.AddRange(states);
}
}