code: public function addIcon($row, $label, Contao\DataContainer $dc=null, $imageAttribute='', $blnReturnImage=false, $blnProtected=false)
  	{
  		return Contao\Backend::addPageIcon($row, $label, $dc, $imageAttribute, $blnReturnImage, $blnProtected);
  	}
docs: Add an image to each page in the tree
  
  @param array                $row
  @param string               $label
  @param Contao\DataContainer $dc
  @param string               $imageAttribute
  @param boolean              $blnReturnImage
  @param boolean              $blnProtected
  
  @return string