LetterNode FindOrCreateNextLetterNode(char nextLetter)
{
if (!this.nextLetter.TryGetValue(nextLetter, out LetterNode next))
{
next = new LetterNode(this)
{
letter = nextLetter.ToString()
};
this.nextLetter.Add(nextLetter, next);
}
return(next);
}
internal LetterNode(LetterNode parent = null)
{
this.parent = parent;
}