code: def unlock_kinetis(jlink):
      
      if not jlink.connected():
          raise ValueError('No target to unlock.')
  
      method = UNLOCK_METHODS.get(jlink.tif, None)
      if method is None:
          raise NotImplementedError('Unsupported target interface for unlock.')
  
      return method(jlink)
docs: Unlock for Freescale Kinetis K40 or K60 device.
  
      Args:
        jlink (JLink): an instance of a J-Link that is connected to a target.
  
      Returns:
        ``True`` if the device was successfully unlocked, otherwise ``False``.
  
      Raises:
        ValueError: if the J-Link is not connected to a target.