AccessoryWithTargetVisibilityState (hap-java 2.0.2 API)

```
public interface AccessoryWithTargetVisibilityState
```
accessory with target visibility state characteristics.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`CompletableFuture<TargetVisibilityStateEnum>`	`getTargetVisibilityState()`	Retrieves the target visibility state.
`CompletableFuture<Void>`	`setTargetVisibilityState(TargetVisibilityStateEnum state)`	Sets the target visibility state
`void`	`subscribeTargetVisibilityState(HomekitCharacteristicChangeCallback callback)`	Subscribes to changes in t target visibility state.
`void`	`unsubscribeTargetVisibilityState()`	Unsubscribes from changes in the target visibility state.

- Method Detail
  - getTargetVisibilityState
```
CompletableFuture<TargetVisibilityStateEnum> getTargetVisibilityState()
```
    Retrieves the target visibility state.
    
    Returns:
    
    a future that will contain the target visibility state
  - setTargetVisibilityState
```
CompletableFuture<Void> setTargetVisibilityState(TargetVisibilityStateEnum state)
                                          throws Exception
```
    Sets the target visibility state
    
    Parameters:
    
    state - the target visibility state to set
    
    Returns:
    
    a future that completes when the change is made
    
    Throws:
    
    Exception - when the change cannot be made
  - subscribeTargetVisibilityState
```
void subscribeTargetVisibilityState(HomekitCharacteristicChangeCallback callback)
```
    Subscribes to changes in t target visibility state.
    
    Parameters:
    
    callback - the function to call when the target visibility state changes.
  - unsubscribeTargetVisibilityState
```
void unsubscribeTargetVisibilityState()
```
    Unsubscribes from changes in the target visibility state.