(PECL haru >= 0.0.1)
HaruAnnotation::setOpened — Set the initial state of the annotation
$opened
   )Defines whether the annotation is initially displayed open. This function may be used with text annotations only.
opened
       TRUE means the annotation is initially displayed open, FALSE -
       means it's closed.
      
   Returns TRUE on success.
  
Hata durumunda bir HaruException istisnası oluşur.