apollo-federation 2.13.1

Apollo Federation
Documentation 
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extend schema
  @link(url: "https://specs.apollo.dev/federation/v2.11")
  @link(
    url: "https://specs.apollo.dev/connect/v0.2"
    import: ["@source", "@connect"]
  )
  @source(name: "json", http: { baseURL: "http://test" })

type Query @connect(source: "json", http: { GET: "/query" }, selection: "x") {
  ts: [T]
    @connect(source: "json", http: { GET: "/ts" }, selection: "id")
    @connect(
      source: "json"
      http: { POST: "/ts", body: "ids: $batch.id" }
      selection: "id"
    )
    @connect(
      source: "json"
      http: { POST: "/ts?ids={$batch.id}" }
      selection: "id"
    )
}

type Mutation
  @connect(source: "json", http: { GET: "/mutation" }, selection: "y") {
  y: String
}

type T
  @connect(
    source: "missing"
    http: { GET: "/ts?json={$batch.id->jsonStringify}" }
    selection: "id name username"
  )
  @connect(
    source: "json"
    http: { GET: "/ts?json={$args.id}" }
    selection: "id name username"
  )
  @connect(
    source: "json"
    http: { POST: "/ts", body: "id: $this.id" }
    selection: "id name typo"
  )
  @connect(
    source: "json"
    http: { POST: "/circular", body: "id: $batch.id" }
    selection: "id friends { id name username }"
  )
  @connect(
    source: "json"
    http: { GET: "/ts?json={$batch.id->jsonStringify}" }
    selection: "id name username"
    entity: false # NOPE
  )
  @connect(
    source: "json"
    http: { GET: "/ts?json={$batch.foo->jsonStringify}" }
    selection: "id name username"
  )
  @connect(
    source: "json"
    http: { GET: "/ts?json={$batch.id->jsonStringify}" }
    selection: "id name username: $batch.id"
  )
  @connect(
    source: "json"
    http: { GET: "/ts?json={$batch.id->jsonStringify}&id={$this.id}" } # $batch & $this
    selection: "id name username"
  )
  @connect(
    source: "json"
    http: { GET: "/ts?json={$batch.id->joinNotNull(',')}" }
    selection: "id name: $this.name username" # $batch & $this
  ) {
  id: ID!
  name: String
  username: String
  friends: [T]
    @connect( # this is also a circular reference error
      source: "json"
      http: { GET: "/friends/{$this.id}" }
      selection: "id name username"
    )
  listRelationship: [String]
    @connect(
      source: "json"
      http: { GET: "/list/{$batch.id->joinNotNull(',')}" }
      selection: "$"
    )
}