from org.eclipse.actf.model.ui.util.ModelServiceUtils
   
    - getActiveModelService() : returns active implementation of IModelService
- launch(URL)/launch(URL, EditorID) : launch (or activate) and return IEditorPart
   ACTF Editors implement IModelServiceHolder, then you can obtain IModelService implementation by 
   ((IModelServiceHolder)editor).getModelServise();