firstWhere method
inherited
 Returns the first element that satisfies the given predicate test.
Iterates through elements and returns the first to satisfy test.
If no element satisfies test, the result of invoking the orElse function is returned. If orElse is omitted, it defaults to throwing a StateError.
Implementation
String firstWhere(bool test(String value), {String orElse()?}) =>
    readClasses().firstWhere(test, orElse: orElse);
    © 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
    https://api.dart.dev/stable/2.13.0/dart-svg/AttributeClassSet/firstWhere.html