GraphQL Nullability - Initial non-nullable schema

VacationRental-initial-schema.graphql

### Initial schema

type Query {
  vacationRentalById(id: $id) : VacationRental
}
 
type VacationRental {
  id: ID!
  title: String!
  description: String!
  owner: Owner!
  roomCount: Int!
  address: Address!
  geolocation: GeoLocation!
  price: Price!
}
 
type Owner {
  name: String!
  email: String!
  phone: String!
  twitterHandle: String!
  inboxNotifications: [Notification]!
}
 
type Address {
  line1: String!
  line2: String!
  city: String!
  state: String!
  zip: String!
}
 
type Price {
  amount: Float!
  currency: String!
}
 
type GeoLocation {
  latitude: String!
  longitude: String!
}
 
type Notification {
  timestamp: String!
  message: String!
}