code: private function parsePanelFilter(PanelRowInterface $row)
      {
          foreach ($this->inputScreen['properties'] as $value) {
              if (!empty($value['filter'])) {
                  $element = new DefaultFilterElementInformation();
                  $element->setPropertyName($value['col_name']);
                  if (!$row->hasElement($element->getName())) {
                      $row->addElement($element);
                  }
              }
          }
      }
docs: Add filter elements to the panel.
  
  @param PanelRowInterface $row The row to which the element shall get added to.
  
  @return void