n_count  = $notification_center->get_notification_count();

		if ( ! $notification_count ) {
			return '';
		}

		/* translators: Hidden accessibility text; %s: number of notifications. */
		$counter_screen_reader_text = sprintf( _n( '%s notification', '%s notifications', $notification_count, 'wordpress-seo' ), number_format_i18n( $notification_count ) );

		return sprintf( ' <div class="wp-core-ui wp-ui-notification yoast-issue-counter"><span class="yoast-issues-count" aria-hidden="true">%d</span><span class="screen-reader-text">%s</span></div>', $notification_count, $counter_screen_reader_text );
	}

	/**
	 * Gets the notification popup if in a valid context.
	 *
	 * @return string Notification popup markup, or empty string if not available.
	 */
	protected function get_notification_popup() {
		$notification_center     = Yoast_Notification_Center::get();
		$new_notifications       = $notification_center->get_new_notifications();
		$new_notifications_count = count( $new_notifications );

		if ( ! $new_notifications_count ) {
			return '';
		}

		$notification = sprintf(
			_n(
				'There is a new notification.',
				'There are new notifications.',
				$new_notifications_count,
				'wordpress-seo'
			),
			$new_notifications_count
		);

		return '<div class="yoast-issue-added">' . $notification . '</div>';
	}

	/**
	 * Checks whether the current user can manage options in the current context.
	 *
	 * @return bool True if capabilities are sufficient, false otherwise.
	 */
	protected function can_manage_options() {
		return ( is_network_admin() && current_user_can( 'wpseo_manage_network_options' ) )
			|| ( ! is_network_admin() && WPSEO_Capability_Utils::current_user_can( 'wpseo_manage_options' ) );
	}

	/**
	 * Add submenu items to a menu item.
	 *
	 * @param array        $submenu_items Submenu items array.
	 * @param WP_Admin_Bar $wp_admin_bar  Admin bar object.
	 * @param string       $parent_id     Parent menu item ID.
	 *
	 * @return void
	 */
	protected function add_submenu_items( array $submenu_items, WP_Admin_Bar $wp_admin_bar, $parent_id ) {
		foreach ( $submenu_items as $menu_item ) {
			$menu_args = [
				'parent' => $parent_id,
				'id'     => $menu_item['id'],
				'title'  => $menu_item['title'],
				'href'   => $menu_item['href'],
				'meta'   => [ 'target' => '_blank' ],
			];
			$wp_admin_bar->add_menu( $menu_args );
		}
	}
}