4.15.16 atomically/2 ¶

-spec atomically(tab(),
                 [atomic_op(Effect)]) -> {ok, [Effect]} |
                                         {error, _}.

Commit a number of operations into a table atomically: either all or none of operations are durably stored by the time this function returns.

Operations are denoted via classy_table:atomic_op/1 type.