Graphical Editing Framework (GEF) Eclipse plug-in
The Graphical Editing Framework (GEF) allows developers to create a rich
graphical editor from an existing application model. GEF is completely
application neutral and provides the groundwork to build almost any
application, including but not limited to: activity diagrams, GUI builders,
class diagram editors, state machines, and even WYSIWYG text editors.
There is no official package available for openSUSE Leap 15.5