Filter Map object values from ArrayList

Question

I have an object similar to the following:

{
  "list": [
    {
      "price": "50",
      "items": {
        "XYZ": {
          "price": "6",
          "id": "1212121"
        },
        "details": {},
        "id": "1647308"
      }
    },
    {
      "price": "20",
      "items": {
        "XYZ": {
          "price": "10",
          "id": "1212121"
        },
        "details": {},
        "id": "1647308"
      }
    }
  ]
}

public class List {
   private string price;
   private List<Item> items;
   private string id;
}

public class Item {
    private Map<String, BonusItem> bonusItem;
}

public BonusItem
{
 private string price;

}

From the above list I need to fetch the array object inside "items"-> "XYZ", and the output should be something like below. I am trying using a Java stream.

[
   {
      "price":"10",
      "id":"1212121"
   },
   {
      "price":"6",
      "id":"1212121"
   }
]

I tried couple of options and getting compile error with lambda and I am new to Java and Map objects.