code: public static function getPath($src)
  	{
  		if ($src == '')
  		{
  			return '';
  		}
  
  		$src = rawurldecode($src);
  
  		if (strpos($src, '/') !== false)
  		{
  			return $src;
  		}
  
  		$rootDir = System::getContainer()->getParameter('kernel.project_dir');
  
  		if (strncmp($src, 'icon', 4) === 0)
  		{
  			if (pathinfo($src, PATHINFO_EXTENSION) == 'svg')
  			{
  				return 'assets/contao/images/' . $src;
  			}
  
  			$filename = pathinfo($src, PATHINFO_FILENAME);
  
  			// Prefer SVG icons
  			if (file_exists($rootDir . '/assets/contao/images/' . $filename . '.svg'))
  			{
  				return 'assets/contao/images/' . $filename . '.svg';
  			}
  
  			return 'assets/contao/images/' . $src;
  		}
  		else
  		{
  			$theme = Backend::getTheme();
  
  			if (pathinfo($src, PATHINFO_EXTENSION) == 'svg')
  			{
  				return 'system/themes/' . $theme . '/icons/' . $src;
  			}
  
  			$filename = pathinfo($src, PATHINFO_FILENAME);
  
  			// Prefer SVG icons
  			if (file_exists($rootDir . '/system/themes/' . $theme . '/icons/' . $filename . '.svg'))
  			{
  				return 'system/themes/' . $theme . '/icons/' . $filename . '.svg';
  			}
  
  			return 'system/themes/' . $theme . '/images/' . $src;
  		}
  	}
docs: Get the relative path to an image
  
  @param string $src The image name or path
  
  @return string The relative path