protected function ajax_slug( $action ) {
		$slug = $action;
		if ( ! empty( $this->action_prefix ) ) {
			$slug = $this->action_prefix . '_' . $slug;
		}
		if ( ! empty( $this->action_surfix ) ) {
			$slug .= '_' . $this->action_surfix;
		}
		return $slug;
	}