You're seeing just the function rollback, go back to Manifest module for more information.


rollback(t()) :: {:ok, map()} | {:error, atom(), any(), map()}

Rolls back each operation in case of failure.

Each Manifest.Step.t/0 that ran previous to the point of failure, defines a Manifest.Step.rollback/0 in the manifest, and didn't receive a :no_rollback in tuple that the step's returned, will be rolled back in reverse from the order the steps were performed. If any of the rollbacks fail, it stops attempting to roll back and returns an :error tuple. The error tuple has the Manifest.Step.operation/0 where it failed as it's second element, the reason as the third, and a map containing the results of all the successful roll backs up to that point.

You can also call rollback/1 on a completely successful Manifest.