ICustomHistoryChangeArgs notifies when the label of an element under goes editing
string
returns the type of the entry that means undo or redo
NodeModel
| ConnectorModel
| SelectorModel
| DiagramModel
| ShapeAnnotation
| PathAnnotation
| PointPortModel
returns an array of objects, where each object represents the changes made in last undo/redo
NodeModel
| ConnectorModel
| SelectorModel
| DiagramModel
| ShapeAnnotation
| PathAnnotation
| PointPortModel
returns a collection of objects that are changed in the last undo/redo