@callback fetch(non_neg_integer(), String.t() | atom(), (any() -> any())) ::
  {:ok | :error | :commit | :ignore, any()}

@callback get(non_neg_integer(), String.t() | atom()) :: {:ok, any()} | {:ok, false}

@callback remove(non_neg_integer(), list()) :: any()

@callback set(non_neg_integer(), list(), any(), Keyword.t()) :: {:ok, any()}

@callback set(non_neg_integer(), String.t() | atom(), any(), Keyword.t()) :: {:ok, any()}