adaptivetheme-8.x-3.x-dev/at_core/templates/block/block--local-tasks-block.html.twig

{%- extends "block.html.twig" -%}
{#
/**
 * @file
 * Theme override for tabs.
 */
#}
{%- block content -%}
  {%- if content -%}
    <nav class="tabs" aria-label="{{ 'Tabs'|t }}">
      {{- content -}}
    </nav>
  {%- endif -%}
{%- endblock -%}