const NoSuchMethodException(Object this._receiver,
                            String this._functionName,
                            List this._arguments,
                            [List existingArgumentNames = null])
    : this._existingArgumentNames = existingArgumentNames;

String toString() {
  StringBuffer sb = new StringBuffer();
  for (int i = 0; i < _arguments.length; i++) {
    if (i > 0) {
      sb.add(", ");
    }
    sb.add(_arguments[i]);
  }
  if (_existingArgumentNames === null) {
    return "NoSuchMethodException : method not found: '$_functionName'\n"
        "Receiver: $_receiver\n"
        "Arguments: [$sb]";
  } else {
    String actualParameters = sb.toString();
    sb = new StringBuffer();
    for (int i = 0; i < _existingArgumentNames.length; i++) {
      if (i > 0) {
        sb.add(", ");
      }
      sb.add(_existingArgumentNames[i]);
    }
    String formalParameters = sb.toString();
    return "NoSuchMethodException: incorrect number of arguments passed to "
        "method named '$_functionName'\nReceiver: $_receiver\n"
        "Tried calling: $_functionName($actualParameters)\n"
        "Found: $_functionName($formalParameters)";
  }
}