Use Preprocess to float an image in a paragraph bundle

/**
 * Implements hook_preprocess_HOOK() for paragraph--para-image-text.html.twig.
 */
function THEME_preprocess_paragraph__para_image_with_text(&$variables) {
  $paragraph = $variables['paragraph'];

  // Get the value of the image style and add it as a class on the image field.
  $style_image = $paragraph->get('field_para_image_with_text_float')->value;
  $variables['attributes']['class'][] = $style_image;

}