{
  "using": ["urn:ietf:params:jmap:core", "urn:ietf:params:jmap:mail"],
  "methodCalls": [
    ["Mailbox/get", {"accountId": "acc1"}, "c1"],
    ["Email/query", {"accountId": "acc1", "filter": {"inMailbox": "inbox1"}}, "c2"],
    ["Email/get", {"accountId": "acc1", "#ids": {"resultOf": "c2", "name": "Email/query", "path": "/ids"}}, "c3"]
  ]
}