public function build()
 {
     $build = parent::build();
     if ($this->count !== TRUE) {
         $build['$limits'] = $this->limits();
     }
     return array_filter($build);
 }
 public function __toString()
 {
     $args = parent::__toString();
     if (strlen($args) > 0) {
         $args = "?{$args}";
     }
     return $this->path() . $args;
 }