SpacerUpdater (vaadin-all 7.7.46 API)

```
public interface SpacerUpdater
```
An interface that handles the display of content for spacers.
The updater is responsible for making sure all elements are properly constructed and cleaned up.

Since:

7.5.0

Author:

Vaadin Ltd

See Also:

Spacer, RowContainer.BodyRowContainer

Field Summary

Fields
Modifier and Type Field Description

static SpacerUpdater NULL
A spacer updater that does nothing.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`destroy(Spacer spacer)`	Called whenever a spacer should be cleaned.
`void`	`init(Spacer spacer)`	Called whenever a spacer should be initialized with content.

- Field Detail
  - NULL
```
static final SpacerUpdater NULL
```
    A spacer updater that does nothing.
- Method Detail
  - init
```
void init(Spacer spacer)
```
    Called whenever a spacer should be initialized with content.
    
    Parameters:
    
    spacer - the spacer reference that should be initialized
  - destroy
```
void destroy(Spacer spacer)
```
    Called whenever a spacer should be cleaned.
    The structure to clean up is the same that has been constructed by init(Spacer).
    
    Parameters:
    
    spacer - the spacer reference that should be destroyed