@callback count(registry_type()) :: non_neg_integer()

@callback list(registry_type()) :: [entry_data()]

@callback lookup(registry_type(), entry_id()) ::
  {:ok, entry_data()} | {:error, :not_found}

@callback register(registry_type(), entry_id(), entry_data()) :: :ok | {:error, term()}

@callback search(registry_type(), String.t()) :: [entry_data()]

@callback unregister(registry_type(), entry_id()) :: :ok | {:error, term()}