/**
  * Default constructor
  *
  * @param MembersList $simple A simple filter search to keep
  */
 public function __construct($simple = null)
 {
     parent::__construct();
     if ($simple instanceof MembersList) {
         foreach ($this->pagination_fields as $pf) {
             $this->{$pf} = $simple->{$pf};
         }
         foreach ($this->memberslist_fields as $mlf) {
             $this->{$mlf} = $simple->{$mlf};
         }
     }
 }