Module Dependency Tree

Animation <-- + <-- Transition
              |
         + <--+ <-- DragAndDrop
         |                                 
 Node <--+ <-- Container <--+ <-- Stage 
         |                  |
         + <-- Shape        + <-- Layer
                            |
                            + <-- Group

Verbose version

• Shape depends on Node
• Group depends on Container which depends on Node
• Layer depends on Container which depends on Node
• DragAndDrop depends on Animation and Node
• Transition depends on Animation and Node
• All shapes, including Rect, Circle, Text, etc., depend on Shape which depends on Node