toString method Null safety

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() {
  String result = "TimeoutException";
  if (duration != null) result = "TimeoutException after $duration";
  if (message != null) result = "$result: $message";
  return result;