pagerduty.endpoint() function

(
    ?url: string,
) => (
    mapFn: (
        r: {A with _pagerdutyDedupKey: string},
    ) => {
        B with
        timestamp: K,
        summary: string,
        source: J,
        severity: I,
        routingKey: H,
        group: G,
        eventAction: F,
        clientURL: E,
        client: D,
        class: C,
    },
) => (<-tables: stream[A]) => stream[{A with _status: string, _sent: string, _pagerdutyDedupKey: string, _body: string}]

import "pagerduty"
import "influxdata/influxdb/secrets"

routingKey = secrets.get(key: "PAGERDUTY_ROUTING_KEY")
toPagerDuty = pagerduty.endpoint()

crit_statuses =
    from(bucket: "example-bucket")
        |> range(start: -1m)
        |> filter(fn: (r) => r._measurement == "statuses" and r.status == "crit")

crit_statuses
    |> toPagerDuty(
        mapFn: (r) =>
            ({r with
                routingKey: routingKey,
                client: r.client,
                clientURL: r.clientURL,
                class: r.class,
                eventAction: r.eventAction,
                group: r.group,
                severity: r.severity,
                source: r.source,
                component: r.component,
                summary: r.summary,
                timestamp: r._time,
                customDetails: {"ping time": r.ping, load: r.load},
            }),
    )()