srecord noeq LeftArrowScriptAutoCompleter(GazelleV_LeftArrowScriptParser parser) {
  LS tok;
  CharInToken cursor;
  S typedCharacters;
  
  void seek(LS text, int iChar) {
    parser.setText(text);
    parser.init();
    tok = parser.tok;
    cursor = charIndexToCharInToken(parser.tok, iChar);
    typedCharacters = takeFirst(cursor.token(), cursor.iChar);
  }
  
  Cl<S> getCompletions() {
    Set<S> set = ciSet();
    fOr (container : parser.functionContainers)
      set.addAll(startingWithIC(methodNames(container), typedCharacters));
    ret set;
  }
}