test1/public/drupal/core/modules/system/templates/indentation....

{#
/**
 * @file
 * Default theme implementation for a set of indentation divs.
 *
 * These <div> tags are used for drag and drop tables.
 *
 * Available variables:
 * - size: Optional. The number of indentations to create.
 *
 * @ingroup themeable
 */
#}
{% for i in 1..size if size > 0 %}<div class="js-indentation indentation">&nbsp;</div>{% endfor %}