Astarte.DataAccess.Config.reload_astarte_instance_id

You're seeing just the function reload_astarte_instance_id, go back to Astarte.DataAccess.Config module for more information.
Link to this function

reload_astarte_instance_id(namespace \\ nil)

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Specs

reload_astarte_instance_id(Skogsra.Env.namespace()) ::
  {:ok, binary()} | {:error, binary()}

Reloads the value for Astarte.DataAccess.Config.astarte_instance_id/0. Optionally, receives the namespace for the variable.