accept method

@override void accept (covariant VisitorBase visitor)

Implementation

@override
void accept(covariant VisitorBase visitor) {
  ruleset = visitor.visit(ruleset) as Ruleset;

//2.3.1
//  DetachedRuleset.prototype.accept = function (visitor) {
//      this.ruleset = visitor.visit(this.ruleset);
//  };
}