ResponsiveImageStyleForm::save

public ResponsiveImageStyleForm::save(array $form, FormStateInterface $form_state)

public function save(array $form, FormStateInterface $form_state) {
  /** @var \Drupal\responsive_image\ResponsiveImageStyleInterface $responsive_image_style */
  $responsive_image_style = $this->entity;
  // Remove all the existing mappings and replace with submitted values.
  $responsive_image_style->removeImageStyleMappings();
  if ($form_state->hasValue('keyed_styles')) {
    foreach ($form_state->getValue('keyed_styles') as $breakpoint_id => $multipliers) {
      foreach ($multipliers as $multiplier => $image_style_mapping) {
        if ($image_style_mapping['image_mapping_type'] === 'sizes') {
          $mapping = array(
            'image_mapping_type' => 'sizes',
            'image_mapping' => array(
              'sizes' => $image_style_mapping['sizes'],
              'sizes_image_styles' => array_keys(array_filter($image_style_mapping['sizes_image_styles'])),
            )
          );
          $responsive_image_style->addImageStyleMapping($breakpoint_id, $multiplier, $mapping);
        }
        elseif ($image_style_mapping['image_mapping_type'] === 'image_style') {
          $mapping = array(
            'image_mapping_type' => 'image_style',
            'image_mapping' => $image_style_mapping['image_style'],
          );
          $responsive_image_style->addImageStyleMapping($breakpoint_id, $multiplier, $mapping);
        }
      }
    }
  }
  $responsive_image_style->save();

  $this->logger('responsive_image')->notice('Responsive image style @label saved.', array('@label' => $responsive_image_style->label()));
  drupal_set_message($this->t('Responsive image style %label saved.', array('%label' => $responsive_image_style->label())));

  // Redirect to edit form after creating a new responsive image style or
  // after selecting another breakpoint group.
  if (!$responsive_image_style->hasImageStyleMappings()) {
    $form_state->setRedirect(
    'entity.responsive_image_style.edit_form', 
    array('responsive_image_style' => $responsive_image_style->id())
    );
  }
  else {
    $form_state->setRedirectUrl($this->entity->urlInfo('collection'));
  }
}