MigrationRule (Apache Zest™ (Java Edition) SDK 2.1)

```
public class MigrationRule
extends AbstractMigrationRule
```
Migration rule that does not apply to a specific entity type

Field Summary
- Fields inherited from class org.qi4j.migration.assembly.AbstractMigrationRule
  fromVersion, toVersion

Constructors
Constructor and Description
`MigrationRule(String fromVersion, String toVersion, MigrationOperation operation)`

Methods
Modifier and Type	Method and Description
`void`	`downgrade(StateStore stateStore, Migrator migrator)`
`String`	`toString()`
`void`	`upgrade(StateStore stateStore, Migrator migrator)`

Methods inherited from class org.qi4j.migration.assembly.AbstractMigrationRule
fromVersion, toVersion

public MigrationRule(String fromVersion,
             String toVersion,
             MigrationOperation operation)

public void upgrade(StateStore stateStore,
           Migrator migrator)
             throws IOException

public void downgrade(StateStore stateStore,
             Migrator migrator)
               throws IOException

Class MigrationRule