34     private $version = null;  variable in Sabre\\VObject\\Component\\VCard
136         if (!$this->version) {
137             $version = (string)$this->VERSION;
138             switch($version) {
140                     $this->version = self::VCARD21;
143                     $this->version = self::VCARD30;
146                     $this->version = self::VCARD40;
149                     $this->version = self::UNKNOWN;
155         return $this->version;
217         $version = $this->select('VERSION');
218         if (count($version)===1) {
219             $version = (string)$this->VERSION;
220             if ($version!=='2.1' && $version!=='3.0' && $version!=='4.0') {
230             if ($version === '2.1' && ($options & self::PROFILE_CARDDAV)) {