MigrationOperation (org.qi4j.extension.migration 2.1 API)

```
public interface MigrationOperation
```
Non-entity specific migration operation. These operations may perform anything necessary to migrate the application. This could include performing disk operations and other non-entity related tasks.

Methods
Modifier and Type	Method and Description
`void`	`downgrade(org.qi4j.spi.entitystore.helpers.StateStore stateStore, Migrator migrator)`
`void`	`upgrade(org.qi4j.spi.entitystore.helpers.StateStore stateStore, Migrator migrator)`

void upgrade(org.qi4j.spi.entitystore.helpers.StateStore stateStore,
           Migrator migrator)
             throws IOException

void downgrade(org.qi4j.spi.entitystore.helpers.StateStore stateStore,
             Migrator migrator)
               throws IOException

Interface MigrationOperation