BeginTx returns selector transaction control option.

CommitTx returns commit transaction control option.

DefaultTxControl returns default transaction control for use default tx control on server-side.

OnlineReadOnlyTxControl returns online read-only transaction control.

SerializableReadWriteTxControl returns transaction control with serializable read-write isolation mode.

SnapshotReadOnlyTxControl returns snapshot read-only transaction control.

StaleReadOnlyTxControl returns stale read-only transaction control.

TxControl makes transaction control from given options.

TxSettings returns transaction settings.

WithRetryBudget creates option with external budget.