See: Description
| Class | Description | 
|---|---|
| ModelElementsManager | 
 The utility class for ModelElements adding, removing and moving to other parents. 
 | 
| PresentationElementsManager | 
 The utility class for ShapesElements and PathElement creating, moving and properties changing. 
 | 
| SessionManager | 
 The singleton manager for Elements editing in the model. 
 | 
| Exception | Description | 
|---|---|
| ReadOnlyElementException | 
 The exception is thrown if user wants to edit not editable(readonly) ModelElement. 
 | 
This package contains helper classes for API users for accessing UML model and notation elements.