'Tri-state value specifying whether this style should have its
:attr:`hidden` attribute set |False| the next time the style is
applied to content. |None| indicates the effective value should be
inherited from the default specified by its parent |LatentStyles|
object.'

@property
def unhide_when_used(self):

    return self._element.on_off_prop(u'unhideWhenUsed')
