drupal_slider-8.x-1.x-dev/templates/drupal-slider-views-style.html.twig

{{attached}}
<div class="slider-pro" id="{{id}}">	
	<div class="sp-slides">{{ rows }}</div>
	{% if rows.0['#view'].style_plugin.render_tokens.0['{{ drupal_slider_thumbnails }}']|render|striptags is not empty %}
		<div class="sp-thumbnails">
			{% for row in rows %}
			{% set img = row['#view'].style_plugin.render_tokens[ loop.index0 ]['{{ drupal_slider_thumbnails }}']|render|striptags %}
				<img class="sp-thumbnail" src="{{ img }}"/>
			{% endfor %}
		</div>	
	{% endif %}
</div>