code: private function drawAttribute(ModelToLabelEvent $event)
      {
          $model     = $event->getModel();
          $metaModel = $this->getMetaModelFromModel($model);
          $attribute = $metaModel->getAttributeById($model->getProperty('attr_id'));
  
          if ($attribute) {
              $type     = $attribute->get('type');
              $image    = $this->iconBuilder->getBackendIconImageTag(
                  $this->attributeFactory->getIconForType($type),
                  $type,
                  '',
                  'bundles/metamodelscore/images/icons/fields.png'
              );
              $name     = $attribute->getName();
              $colName  = $attribute->getColName();
              $isUnique = $attribute->get('isunique');
          } else {
              $type     = 'unknown ID: ' . $model->getProperty('attr_id');
              $image    = $this->iconBuilder->getBackendIconImageTag('bundles/metamodelscore/images/icons/fields.png');
              $name     = 'unknown attribute';
              $colName  = 'unknown column';
              $isUnique = false;
          }
  
          $event
              ->setLabel('<div class="field_heading cte_type %s"><strong>%s</strong> <em>[%s]</em></div>
                  <div class="field_type block">
                      %s<strong>%s</strong><span class="mandatory">%s</span> <span class="tl_class">%s</span>
                  </div>')
              ->setArgs([
                  $model->getProperty('published') ? 'published' : 'unpublished',
                  $colName,
                  $type,
                  $image,
                  $name,
                  // unique attributes are automatically mandatory
                  $model->getProperty('mandatory') || $isUnique
                      ? ' ['. $this->trans('mandatory.0') . ']'
                      : '',
                  $model->getProperty('tl_class') ? sprintf('[%s]', $model->getProperty('tl_class')) : ''
              ]);
      }
docs: Draw the input screen setting.
  
  @param ModelToLabelEvent $event The event.
  
  @return void