pkg/front_end/test/fasta/util/direct_parser_ast_test_data/mixin.txt

mixin B {
  static int staticField = 0;
  void foo() {
    // empty
  }

  // Mixins cannot have constructors (or members with same name as mixin).
  factory B() {
    // empty
  }

  B.foo() {
    // empty
  }
}