public function start_rollback() {
		if ( ! isset( $_GET['_wpnonce'] ) || ! wp_verify_nonce( $_GET['_wpnonce'], $this->product->get_key() . '_rollback' ) ) {
			wp_nonce_ays( '' );
		}

		if ( $this->product->is_plugin() ) {
			$this->start_rollback_plugin();

			return;
		}
		if ( $this->product->is_theme() ) {
			$this->start_rollback_theme();

			return;
		}
	}