code: protected function validate()
  	{
  		foreach (\func_get_args() as $strPath)
  		{
  			if ($strPath == '') // see #5795
  			{
  				throw new \RuntimeException('No file or folder name given');
  			}
  			elseif (Validator::isInsecurePath($strPath))
  			{
  				throw new \RuntimeException('Invalid file or folder name ' . $strPath);
  			}
  		}
  	}
docs: Validate a path
  
  @throws \RuntimeException If the given paths are not valid