class_docstr: Saves model topology, losses & metrics
class_docstr_tok: ["Saves","model","topology",",","losses","&","metrics"]
code: def before_batch(self):
      self.ti_batch = time.perf_counter()
  
imports: from __future__ import annotations
  from ..basics import *
  from .progress import *
  from ..text.data import TensorText
  from ..tabular.all import TabularDataLoaders, Tabular
  from .hook import total_params
  from .tracker import SaveModelCallback
  import wandb
label_desc: Use image node_id 4 for calling the WandbCallback obj's underlying member method code with example usage: obj.before_batch() without return types