readme.md

Created with <3 with dartpad.dev.

main.dart

class NavigationItem {
  final String url;
  final String label;
  final List<NavigationItem> children;

  NavigationItem({
    required this.url,
    required this.children,
    required this.label,
  });

  @override
  String toString() {
    var output = "$label: $url\n";
    for (var child in children) {
      output += "\t-- ${child.toString()}";
    }

    return output;
  }
}

void printAllExceptTopLevel(NavigationItem top) {
  for (var child in top.children) {
    print(child.toString());
  }
}

void main() {
  var parents = <NavigationItem>[];
  for (int j = 0; j < 5; j++) {
    var children = <NavigationItem>[];
    for (var i = 0; i < 10; i++) {
      children.add(
        NavigationItem(
          label: "name ${i.toString()}",
          url: "testingURL",
          children: [],
        ),
      );
    }
    parents.add(NavigationItem(
        children: children, label: "parent ${j.toString()}", url: "testing",));
  }
  var top =
      NavigationItem(children: parents, label: "Top level", url: "testing",);
  printAllExceptTopLevel(top);
}