code: public function push($url, $table, $icon)
      {
          $this->elements[] = [
              'url' => $url,
              'text' => $this->getLabel($table),
              'icon' => $this->iconBuilder->getBackendIcon($icon)
          ];
      }
docs: Push an entry.
  
  @param string $url   The url.
  @param string $table The table.
  @param string $icon  The icon.
  
  @return void