class_docstr: Tracker which sources information from .pickle files providing
  configurations of ensemble members and the ensembles' performances.
class_docstr_tok: ["Tracker","which","sources","information","from",".pickle","files","providing","configurations","of","ensemble","members","and","the","ensembles","'","performances","."]
code: def get_performance(
      self, config: Config[EnsembleConfig]
  ) -> Performance:
      return self.performance_map[config]
  
file_path: gluonts/src/gluonts/nursery/tsbench/src/tsbench/evaluations/tracking/ensemble.py
imports: import os
  import pickle
  from pathlib import Path
  from typing import Dict, List
  from tsbench.config import Config, EnsembleConfig
  from tsbench.evaluations.metrics import Performance
  from ._base import Tracker
  from ._evaluations import Evaluations
label_desc: Use image node_id 4 for calling the EnsembleTracker obj's underlying member method code with example usage: obj.get_performance(config) and returns: self