code: def update(self, update_finished_cb):
          
          if not self._update_finished_cb:
              self._update_finished_cb = update_finished_cb
              self.anchor_data = []
              self.nr_of_anchors = 0
              self.valid = False
              logger.debug('Updating content of memory {}'.format(self.id))
  
              # Start reading the header
              self.mem_handler.read(self, LocoMemory.MEM_LOCO_INFO,
                                    LocoMemory.MEM_LOCO_INFO_LEN)
docs: Request an update of the memory content