Convert a Set to a string as {each, element, as, string}.
Handles circular references where converting one of the elements to a string ends up converting set to a string again.
static String setToString(Set set) =>
IterableBase.iterableToFullString(set, '{', '}');
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dart.dev/stable/2.5.0/dart-collection/SetBase/setToString.html