/**
  * get fulldescription adding basedon
  *
  * @return fulldescription
  **/
 function get_fulldescription_with_basedon()
 {
     $ret = '';
     if ($this->instance->basedon) {
         //Show recursive varaitions
         $basevpl = new mod_vpl(false, $this->instance->basedon);
         $ret .= $basevpl->get_fulldescription_with_basedon();
     }
     return $ret . $this->get_fulldescription();
 }