Verk.Queue.range-exclamation-mark

You're seeing just the function range-exclamation-mark, go back to Verk.Queue module for more information.
Link to this function

range!(queue, start \\ 0, stop \\ -1)

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Specs

range!(binary(), integer(), integer()) :: [Verk.Job.T]

Lists enqueued jobs from start to stop, raising if there's an error.