type Pizza {
    id: ID!
    nameEn: String
    nameIt: String!
    toppings: [Topping!]!
}

union Topping = Onion | Cheese | Pineapple

type Onion {
    variety: String
}

type Cheese {
    type: String!
    quantity: Int!
}

type Pineapple {
    isAnanas: Boolean!
}

type Query {
    pizza(id: ID!): Pizza
}