def METHOD_NAME(self):
    """
    This method is called when the plugin loses focus.
    It should take any actions necessary to stop handling user
    interaction events that were initiated in ``start()`` or
    ``resume()``.
    This method may be called many times as the plugin is focused
    or defocused.  It may be omitted if there is no user event handling
    to disable.
    """
    pass