TOuhrouche

// 1. return the number of bundle that can be assembled from a list of products
// 2. Bundle is a tree of products with multiple nested levels
// 3. return the count without knowing the number of tree levels (N Stages).

int getBundleCount(List<Product> products, Product bundle) {
  Map<String, int> productsListLeaves = {};
  for (Product product in products) {
    if (productsListLeaves[product.name] == null) {
      productsListLeaves[product.name] = 1;
    } else {