code: def cmd_flashbootloader(self, args):
          '''flash bootloader'''
          self.master.mav.command_long_send(self.settings.target_system,
                                            0,
                                            mavutil.mavlink.MAV_CMD_FLASH_BOOTLOADER,
                                                0, 0, 0, 0, 0, 290876, 0, 0f cmd_flashbootloader(self, args):
          '''flash bootloader'''
          self.master.mav.command_long_send(self.settings.target_system,
                                            0,
                                            mavutil.mavlink.MAV_CMD_FLASH_BOOTLOADER,
                                                0, 0, 0, 0, 0, 290876, 0, 0)
docs: flash bootloader