docs: def set_http_boot_url(self, url):
          """Set url to the UefiShellStartupUrl to the system in uefi boot mode.
  
          :param url: URL for http boot
          :raises: IloError, on an error from iLO.
          :raises: IloCommandNotSupportedInBiosError, if the system is
                   in the bios boot mode.
          """
          if(self._is_boot_mode_uefi() is True):
              self._change_bios_setting({'UefiShellStartupUrl': url})
          else:
              msg = 'set_http_boot_url is not supported in the BIOS boot mode'
              raise exception.IloCommandNotSupportedInBiosError(msg)