toString method

@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.

Implementation

@override
String toString() {
  final Object? capturedReason = reason;
  if (capturedReason == null) {
    return 'CancellationException';
  }
  // capturedReason is provably non-null here, so its toString() is safe and
  // never renders the literal 'null'.
  return 'CancellationException: ${capturedReason.toString()}';
}