```
public interface Lockable
```
The Lockable interface defines methods to set the status of an object to be locked or unlocked and to determine the status. Depending instances may use Lockable instances to determine whether to modify an implementing instance or keep it untouched. An implementing instance may throw the org.refcodes.exception.LockedRuntimeException or the org.refcodes.exception.LockedException, depending whether it wants that exception to be checked or not.

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`isLocked()`	Determines whether the implementing instance is locked.
`void`	`lock()`	Locks the implementing instance.
`void`	`unlock()`	Unlocks the implementing instance.

Interface Lockable