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() {
  var prefix = 'JSON-RPC error $code';
  var errorName =;
  if (errorName != null) prefix += ' ($errorName)';
  return '$prefix: $message';