code: def update(self, delta_n: int, *, total: Optional[int] = None):
      self._progress.update(self.tid, advance=delta_n, total=total)
  
imports: from typing import Optional, Callable, Tuple, List
  from rich import filesize
  from rich.progress import MofNCompleteColumn, BarColumn, TextColumn, TimeRemainingColumn, TimeElapsedColumn, Progress, ProgressColumn, TaskProgressColumn, Task
  from rich.text import Text
label_desc: Use image node_id 3 for calling the SimpleCopyToolProgressBarTask obj's underlying member method code with example usage: obj.update(delta_n) without return types