schema
  @link(url: "https://specs.apollo.dev/link/v1.0")
  @link(url: "https://specs.apollo.dev/join/v0.3", for: EXECUTION)
  @link(url: "https://specs.apollo.dev/inaccessible/v0.2", for: SECURITY) {
  query: Query
}

directive @inaccessible on FIELD_DEFINITION | OBJECT | INTERFACE | UNION | ARGUMENT_DEFINITION | SCALAR | ENUM | ENUM_VALUE | INPUT_OBJECT | INPUT_FIELD_DEFINITION

directive @join__enumValue(graph: join__Graph!) repeatable on ENUM_VALUE

directive @join__field(
  graph: join__Graph
  requires: join__FieldSet
  provides: join__FieldSet
  type: String
  external: Boolean
  override: String
  usedOverridden: Boolean
) repeatable on FIELD_DEFINITION | INPUT_FIELD_DEFINITION

directive @join__graph(name: String!, url: String!) on ENUM_VALUE

directive @join__implements(
  graph: join__Graph!
  interface: String!
) repeatable on OBJECT | INTERFACE

directive @join__type(
  graph: join__Graph!
  key: join__FieldSet
  extension: Boolean! = false
  resolvable: Boolean! = true
  isInterfaceObject: Boolean! = false
) repeatable on OBJECT | INTERFACE | UNION | ENUM | INPUT_OBJECT | SCALAR

directive @join__unionMember(
  graph: join__Graph!
  member: String!
) repeatable on UNION

directive @link(
  url: String
  as: String
  for: link__Purpose
  import: [link__Import]
) repeatable on SCHEMA

scalar join__FieldSet

scalar link__Import

enum link__Purpose {
  SECURITY
  EXECUTION
}

enum join__Graph {
  S0 @join__graph(name: "s0", url: "http://localhost:4001/s0")
  S1 @join__graph(name: "s1", url: "http://localhost:4001/s1")
  S2 @join__graph(name: "s2", url: "http://localhost:4001/s2")
  S3 @join__graph(name: "s3", url: "http://localhost:4001/s3")
}

type Query
  @join__type(graph: S0)
  @join__type(graph: S1)
  @join__type(graph: S2)
  @join__type(graph: S3) {
  me: Account @join__field(graph: S3)
}

type AccountA implements Account
  @join__type(graph: S2, key: "notUsed")
  @join__type(graph: S3, key: "notUsed")
  @join__implements(graph: S3, interface: "Account") {
  notUsed: Boolean!
    @join__field(graph: S2, external: true)
    @join__field(graph: S3)
}

type AccountB implements Account
  @join__type(graph: S3, key: "notUsed")
  @join__implements(graph: S3, interface: "Account") {
  notUsed: Boolean! @join__field(graph: S3)
}

interface Account
  @join__type(graph: S0, key: "notUsed", isInterfaceObject: true)
  @join__type(graph: S1, key: "notUsed", isInterfaceObject: true)
  @join__type(graph: S3) {
  notUsed: Boolean!
}
