[document web]
++[tree] setsize:2
++++[tree item] name='Cat' selectable level:1 posinset:1 setsize:2
++++++[static] name='%E2%80%A2 '
++++++[static]
++++++++[static] name='Cat'
++++[tree item] name='Dog' selectable level:1 posinset:2 setsize:2
++++++[static] name='%E2%80%A2 '
++++++[static] name='Dog'