toString method Null safety

  1. @override
String toString()

A string representation of this object.

Some classes have a default textual representation, often paired with a static parse function (like int.parse). These classes will provide the textual representation as their string representation.

Other classes have no meaningful textual representation that a program will care about. Such classes will typically override toString to provide useful information when inspecting the object, mainly for debugging or logging.


String toString() {
  final buffer = StringBuffer();
  buffer..write('MailException: ')..write(message);
  if (details != null) {
  if (stackTrace != null) {
  return buffer.toString();