WP_Import::header PHP Method

        function header()
        {
            echo '<div class="wrap">';
            screen_icon();
            echo '<h2>' . __('Import WordPress', 'wordpress-importer') . '</h2>';
            $updates = get_plugin_updates();
            $basename = plugin_basename(__FILE__);
            if (isset($updates[$basename])) {
                $update = $updates[$basename];
                echo '<div class="error"><p><strong>';
                printf(__('A new version of this importer is available. Please update to version %s to ensure compatibility with newer export files.', 'wordpress-importer'), $update->update->new_version);
                echo '</strong></p></div>';
            }
        }