Astarte.DataAccess.Interface.check_if_interface_exists

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

check_if_interface_exists(realm, interface_name, major_version)

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Specs

check_if_interface_exists(String.t(), String.t(), non_neg_integer()) ::
  :ok | {:error, atom()}