EVENT_OBJECT_HIDE on <div#heading-root.a> role=ROLE_SYSTEM_GROUPING name="Heading" level=2
EVENT_OBJECT_REORDER on <div> role=ROLE_SYSTEM_TOOLBAR IA2_STATE_HORIZONTAL
EVENT_OBJECT_SHOW on <div#banner-root.b> role=ROLE_SYSTEM_GROUPING name="Banner"