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() {
  if (kReleaseMode) {
    return 'A provider for $valueType unexpectedly returned null.';
  }
  return '''
Error: The widget $widgetType tried to read Provider<$valueType> but the matching
provider returned null.

To fix the error, consider changing Provider<$valueType> to Provider<$valueType?>.
''';
}