[
  {
    "business": "b1",
    "id": "b1",
    "parent": null,
    "kind": "business",
    "seq": 0
  },
  {
    "business": "b1",
    "id": "s1",
    "parent": "b1",
    "kind": "sdk",
    "seq": 1
  },
  {
    "business": "b1",
    "id": "u1",
    "parent": "s1",
    "kind": "upstream",
    "seq": 2,
    "outcome": "failed"
  },
  {
    "business": "b1",
    "id": "u2",
    "parent": "s1",
    "kind": "upstream",
    "seq": 3,
    "outcome": "success"
  }
]