code: public function set($key, $value = null)
      {
          $keys = is_array($key) ? $key : [$key => $value];
  
          foreach ($keys as $key => $value) {
              self::updateOrCreate(['key' => $key], ['value' => $value]);
          }
  
          // @todo: return the option
      }
docs: Set a given option value.
  
  @param  array|string  $key
  @param  mixed   $value
  @return void