How can I theme the Responsive Image module in a specific Paragraph Type
I found a solution, but I'm honestly not happy with it.  I can use 'responsive_image_style_id' to identify this responsive image. The problem with this approach is that it relies on specific keywords ('_style') in 'responsive_image_style_id' and if a site admin changes that, it will break :

function paia_theme_suggestions_responsive_image_alter(&amp;$suggestions, $vars, $hook) {

  $newHook = str_replace('_style', '', $vars['responsive_image_style_id']);

  if ($newHook != $vars['responsive_image_style_id']) {
    $suggestions[] = $hook . '__' . $newHook;
  }
}


It seems I am using entirely the wrong approach for this, and I should probably be rolling my own module or something totally different. But I have a deadline to meet and I need to move on.