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() {
  var stringBuffer = StringBuffer();
  stringBuffer.write(_value);
  if (parameters != null && parameters!.isNotEmpty) {
    _parameters!.forEach((name, value) {
      stringBuffer
        ..write('; ')
        ..write(name)
        ..write('=')
        ..write(value);
    });
  }
  return stringBuffer.toString();
}