51     private $pkSignature;  variable in GTTimeSignature
116                     $pkSignature = new GTSignatureInfo();
117                     $pkSignature->decode($sequence);
119                     $this->pkSignature = $pkSignature;
159         if ($this->pkSignature !== null) {
166             $tag->setObject($this->pkSignature);
200         return $this->pkSignature == null;
289         return $this->pkSignature;
295      * @param  GTSignatureInfo $pkSignature public key signature
298     public function setPkSignature($pkSignature) {  argument
299         $this->pkSignature = $pkSignature;