AXWebArea AXRoleDescription='HTML content'
++AXButton AXRoleDescription='button' AXTitle='Regular button'
++AXCheckBox AXSubrole=AXToggleButton AXRoleDescription='toggle button' AXTitle='Toggle button unpressed' AXValue=0
++AXCheckBox AXSubrole=AXToggleButton AXRoleDescription='toggle button' AXTitle='Toggle button pressed' AXValue=1
++AXCheckBox AXSubrole=AXToggleButton AXRoleDescription='toggle button' AXTitle='Toggle button mixed' AXValue=2