description

# toString method Null safety

String toString ()
override

Returns a string representation of this object.

## Implementation

    String toString() {
      String? name = this.name;
      String nameString = (name == null) ? "" : " ($name)";
      Object? message = this.message;
      var messageString = (message == null) ? "" : ": ${message}";
      String prefix = "$_errorName$nameString$messageString";
      if (!_hasValue) return prefix;
      // If we know the invalid value, we can try to describe the problem.
      String explanation = _errorExplanation;
      String errorValue = Error.safeToString(invalidValue);
      return "$prefix$explanation: $errorValue";
    }