class_docstr: A parent class for all trackers
code: def from_config(cls, cfg: CfgNode_):
      raise NotImplementedError("Calling BaseTracker::from_config")
  
file_path: detectron2/detectron2/tracking/base_tracker.py
imports: from detectron2.config import configurable
  from detectron2.utils.registry import Registry
  from ..config.config import CfgNode
  from ..structures import Instances
label_desc: Use image node_id 2 for calling the BaseTracker obj's underlying member method code with example usage: obj.from_config(cls, cfg) without return types