```
public class UndoHelper
extends Object
```
Gives access to platform-specific UndoHandler collector of model undoable actions. Likely, SRepository shall supply UndoHandler instance for its models, so that we don't really need this singleton at all. Perhaps, accessor could be part of SRepositoryExt or SRepositoryAux if we don't want to mix register functionality with undo.

All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`void`	`addUndoableAction(SNodeUndoableAction action)`
`void`	`flushCommand()`	Deprecated. This method is unused, no-op and scheduled for removal, just don't use it any more
`static UndoHelper`	`getInstance()`
`void`	`setUndoHandler(UndoHandler handler)`
`void`	`startCommand(UndoContext context)`	Deprecated. This method is unused, no-op and scheduled for removal, just don't use it any more

public static UndoHelper getInstance()

public void setUndoHandler(UndoHandler handler)

public void addUndoableAction(SNodeUndoableAction action)

Class UndoHelper