/// <summary>
/// Return tokenized set of a string.
/// </summary>
/// <param name="word">input</param>
/// <returns>tokenized version of a string as a set</returns>
public Collection <string> TokenizeToSet(string word)
{
if (!String.IsNullOrEmpty(word))
{
SuppliedWord = word;
return(TokenUtilities.CreateSet(Tokenize(word)));
}
return(null);
}