flow2-8.x-4.0-beta3/templates/form/input--search.html.twig

{#
/**
 * @file
 * Theme override for an 'input' #type form element.
 *
 * Available variables:
 * - attributes: A list of HTML attributes for the input element.
 * - children: Optional additional rendered elements.
 *
 * @see template_preprocess_input()
 */
#}
<div class="input-group">
<input{{ attributes }} />{{ children }}
</div>