✔︎"> ✘︎"> ✔︎"> ]> Dart @namespace xht url("http://www.w3.org/1999/xhtml"); xht|th{font-weight:inherit; width:4rem; height:2rem} xht|td{text-align:center} Dart classes The Dart progrmming language has several class modifiers which can be used to constrain the usage of a class. Can be... class abstract class base class abstract base class interface class abstract interface class final class abstract final class sealed class mixin mixin class abstract mixin class base mixin class abstract base mixin class instantiated?&v;&x;&v;&x;&v;&x;&v;&x;&x;&x;&v;&x;&v;&x; inherited? &v;&v;&v;&v;&q;&q;&q;&q;&q;&x;&v;&v;&v;&v; derived? &v;&v;&v;&v;&v;&v;&v;&v;&v;&x;&x;&x;&x;&x; implemented? &v;&v;&q;&q;&v;&v;&x;&x;&q;&x;&v;&v;&q;&q; mixed in? &x;&x;&x;&x;&x;&x;&x;&x;&x;&v;&v;&v;&v;&v; Legend: &v;: Yes&x;: No&q;: Only within the same library