torDisplayString(item.locator), "", item.message.reason]
    }

    function disruptionValue(item) {
        // We classify these disruption samples with this message if it thinks
        // it looks like a problem in the CI cluster running the tests, not the cluster under test.
        // (typically DNS lookup problems)
        if (item.message.reason === "DisruptionSamplerOutageBegan") {
            return [buildLocatorDisplayString(item.locator), "", "CIClusterDisruption"]
        }
        return [build