code: public static SubstitutedLine parseLine(String str, ParsingStateCallbackHandler callbackHandler, ParsingState initialState) throws CommandFormatException {
          return parseLine(str, callbackHandler, initialState, true);
      }
docs: Returns the string which was actually parsed with all the substitutions
  performed. NB: No CommandContext being provided, variables can't be
  resolved. variables should be already resolved when calling this parse
  method.