/**
* A chain of transactions. Transactions in a chain need to be committed in sequence and each
* transaction should see the effects of previous transactions as if they happened. A chain
* makes no guarantees of atomicity, in fact transactions are committed as soon as possible.
*/
/**
* A chain of transactions. Transactions in a chain need to be committed in sequence and each
* transaction should see the effects of previous transactions as if they happened. A chain
* makes no guarantees of atomicity, in fact transactions are committed as soon as possible.
*/