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() {
  final StringBuffer result = StringBuffer();
  if (key != null) {
    result.write('$key, ');
  if (decoration != null) {
    result.write('$decoration, ');
  if (children == null) {
    result.write('child list is null');
  } else if (children!.isEmpty) {
    result.write('no children');
  } else {
  return result.toString();