morpheus-graphql-core-0.12.0: test/schema/validation/interface/ok/schema.gql

type Query {
  deity(name: String): Deity!
}

interface Character {
  name: String
}

interface Supernatural {
  power: [String!]!
}

type Hero implements Character {
  name: String
}

type Deity implements Character & Supernatural {
  name: String!
  power: [String!]!
}