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| Classes that provide the basic workbench UI support for undo and redo of |
| operations. |
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| Package Specification</h2> |
| This package provides utilities that implement the common function for interacting |
| with the workbench operation history. The <b>workbench operation support</b> provides |
| access to the operation history used by the workbench and a context that should |
| be used to identify operations global to the workbench. The workbench history is used |
| to maintain all undoable operations that occur in the workbench. Standard action |
| handlers and an associated action group are provided so that any view or editor |
| can easily add undo/redo support that works with the workbench operations history. |
| Specialized <b>operation approvers</b> can be used by clients to get user approval |
| for unexpected conditions in the operation history. |
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