• collapse node-Activity:Level 1
    • level 2
    • Messagelevel 2
    • collapse node-Messagelevel 2
      • Messagelevel 3
      • level 3
      • Messagelevel 3
    • Filelevel 2
  • collapse node-Activity:Level 2
    • Activity:level 2
    • Bookmarklevel 2
    • expand node+MessageExpandable node