toString method

@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() {
  final stringBuffer = StringBuffer();
  _map.forEach((key, value) {
    for (final e in value) {
      stringBuffer.writeln('$key: $e');
    }
  });
  return stringBuffer.toString();
}