public static IEnumerable <Grapheme> ToGraphemes(this IEnumerable <Codepoint> that)
 {
     return(Grapheme.FromCodepointsMany(that));
 }
 public static IEnumerable <Grapheme> ToGraphemes(this IEnumerable <char> that)
 {
     return(Grapheme.FromCharsMany(that));
 }