toString method Null safety

@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() {
  switch (_code) {
    case 1:
      return "failed";
    case 2:
      return "unsatisfied";
    case 4:
      return "unknown";
    case 10:
      return "satisfied";
    default:
      return "error";
  }
}