Use Gson's default deserialization to convert the JSON string into an instance of the PerfectPizza class.
Tip: Use the gson object provided.
Gson gson = new Gson();
String perfectPizzaJson = "{\"crust\": \"crispy\",
\"toppings\": \"everything\", \"meat_amount\": \"a lot\"}";
PerfectPizza aPerfectPizza = _________________; // Fill in this blank