code: def add_scalar(
      self, name: str, value: Union[int, float, "np.number"], step: int
  ) -> None:
      pass
  
file_path: determined/harness/determined/tensorboard/metric_writers/callback.py
imports: import abc
  import logging
  from typing import TYPE_CHECKING, Any, Dict, List, Optional, Union
  from determined import util
label_desc: Use image node_id 1 for calling the MetricWriter obj's underlying member method code with example usage: obj.add_scalar(name, value, step) without return types