public Document(Vocab vocab, Unicode[] words, bool[] spaces, Dictionary <string, object> user_data = null)
 {
     Vocab    = vocab;
     Words    = words;
     Spaces   = spaces;
     UserData = user_data;
 }
 public Token(Vocab vocab, Document doc, int offset)
 {
 }
 public Lexeme(Vocab vocab, int orth)
 {
     ParentVocab = vocab;
     Orth        = orth;
 }