code: public function deleteElement($row, $href, $label, $title, $icon, $attributes)
  	{
  		$objElement = $this->Database->prepare("SELECT id FROM tl_content WHERE cteAlias=? AND type='alias'")
  									 ->limit(1)
  									 ->execute($row['id']);
  
  		return $objElement->numRows ? Contao\Image::getHtml(preg_replace('/\.svg$/i', '_.svg', $icon)) . ' ' : '<a href="'.$this->addToUrl($href.'&amp;id='.$row['id']).'" title="'.Contao\StringUtil::specialchars($title).'"'.$attributes.'>'.Contao\Image::getHtml($icon, $label).'</a> ';
  	}
docs: Return the delete content element button
  
  @param array  $row
  @param string $href
  @param string $label
  @param string $title
  @param string $icon
  @param string $attributes
  
  @return string