public function getValue()
 {
     if ($this->transformer) {
         return $this->transformer->get($this->getRow());
     }
     return parent::getValue();
 }
 public function get($data)
 {
     return sprintf('<a href="%s">%s</a>', str_replace($this->id_placeholder, $data['id'], $this->href), $this->transformer->get($data));
 }