code: def initialize_loss_tracker(self):
      self.loss_tracker = l_t.LossTracker(self.loss_names)
      self.losses = self.loss_tracker.losses
  
imports: import torch
  import tqdm
  from ..utils import common_functions
  from ..utils import loss_tracker
  from ..utils.key_checker import KeyChecker, KeyCheckerDict
label_desc: Use image node_id 25 for calling the BaseTrainer obj's underlying member method code with example usage: obj.initialize_loss_tracker() without return types