public function __construct()
{
parent::__construct();
$this->cron_hook_identifier = $this->identifier . '_cron';
$this->cron_interval_identifier = $this->identifier . '_cron_interval';
add_action($this->cron_hook_identifier, array($this, 'handle_cron_healthcheck'));
add_filter('cron_schedules', array($this, 'schedule_cron_healthcheck'));
}