class_docstr: Requires `task.fields[unit]` to be set.
code: def render(self, task):
      ret = super().render(task)
      unit = task.fields.get("unit")
      return ret.append(f" {unit}") if unit else ret
  
file_path: dvc/dvc/ui/_rich_progress.py
imports: from funcy import split
  from rich.progress import BarColumn, DownloadColumn, MofNCompleteColumn, Progress, SpinnerColumn, TextColumn, TimeElapsedColumn, TimeRemainingColumn, TransferSpeedColumn
label_desc: Use image node_id 1 for calling the MofNCompleteColumnWithUnit obj's underlying member method code with example usage: obj.render(task) and returns: unknown