Spear.Client.ack

You're seeing just the callback ack, go back to Spear.Client module for more information.
Link to this callback

ack(subscription, event_or_ids)

View Source (since 0.6.0)

Specs

ack(subscription :: reference(), event_or_ids :: Spear.Event.t() | [String.t()]) ::
  :ok | {:error, any()}

A wrapper around Spear.ack/3