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      "resultdb": {
        "current_invocation": {
          "name": "invocations/build:8945511751514863184",
          "update_token": "token"
        },
        "hostname": "rdbhost"
      }
    },
    "name": "get roll direction.is forward",
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@1@@@"
    ]
  },
  {
    "cmd": [
      "git",
      "merge-base",
      "--is-ancestor",
      "2d72510e447ab60a9728aeea2362d8be2cbd7789",
      "1111111111111111111111111111111111111111"
    ],
    "cwd": "[START_DIR]/checkout/a1",
    "luci_context": {
      "realm": {
        "name": "project:ci"
      },
      "resultdb": {
        "current_invocation": {
          "name": "invocations/build:8945511751514863184",
          "update_token": "token"
        },
        "hostname": "rdbhost"
      }
    },
    "name": "get roll direction.is backward",
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@1@@@"
    ]
  },
  {
    "cmd": [],
    "name": "cancelling roll",
    "~followup_annotations": [
      "@@@STEP_SUMMARY_TEXT@not updating from 1111111 to 2d72510 because 1111111 is newer than 2d72510@@@",
      "@@@STEP_LINK@1111111111111111111111111111111111111111@https://foo.googlesource.com/a1/+/1111111111111111111111111111111111111111@@@",
      "@@@STEP_LINK@2d72510e447ab60a9728aeea2362d8be2cbd7789@https://foo.googlesource.com/a1/+/2d72510e447ab60a9728aeea2362d8be2cbd7789@@@"
    ]
  },
  {
    "name": "$result"
  }
]