parameters property
List of URI template parameter keys, if the Link is templated.
Implementation
// Escaping the last } is somehow required, otherwise the regex can't be parsed on a Pixel
// 3a. However, without it works with the unit tests.
Iterable<String> get parameters => RegExp("\\{\\??([^}]+)\\}")
.allMatches(uri)
.toList()
.expand((it) => it.group(1)!.split(","))
.toSet();