public static UniqueNGramCollection Create(NGramCollection ngrams)
{
if (ngrams == null)
{
throw new ArgumentNullException(nameof(ngrams));
}
UniqueNGramCollection uniqueNgrams = new UniqueNGramCollection(ngrams.GramLength);
foreach (NGram gram in ngrams.Grams)
{
uniqueNgrams.Add(gram);
}
return(uniqueNgrams);
}
