You're seeing just the function notify, go back to Oban.Notifier module for more information.
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notify(conf_or_server \\ Oban, channel, payload)

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  Oban.Config.t() | server(),
  channel :: channel(),
  payload :: map() | [map()]
) :: :ok

Broadcast a notification to listeners on all nodes.

Notifications are scoped to the configured prefix. For example, if there are instances running with the public and private prefixes, a notification published in the public prefix won't be picked up by processes listening with the private prefix.

Using notify/3 with a config is soft deprecated. Use a server as the first argument instead


Broadcast a gossip message:

Oban.Notifier.notify(:gossip, %{message: "hi!"})