public function get($idSite, $idNote)
    {
        $this->checkIdSiteIsLoaded($idSite);
        $this->checkNoteExists($idSite, $idNote);

        $annotation = $this->annotations[$idSite][$idNote];
        $this->augmentAnnotationData($idSite, $idNote, $annotation);
        return $annotation;
    }