toString method Null safety

  1. @override
String toString()
override

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 () {
  ReporterManager? reporter = ioc.use<ReporterManager>();
  if (reporter != null) {
    reporter.write('[ Invalid parameter ] $cause');
  }

  return '[ Invalid parameter ] $cause';
}