code: def unlock(self):
          
          if not unlockers.unlock(self, self._device.manufacturer):
              raise errors.JLinkException('Failed to unlock device.')
  
          return True
docs: Unlocks the device connected to the J-Link.
  
          Unlocking a device allows for access to read/writing memory, as well as
          flash programming.
  
          Note:
            Unlock is not supported on all devices.
  
          Supported Devices:
            Kinetis
  
          Returns:
            ``True``.
  
          Raises:
            JLinkException: if the device fails to unlock.