code: def send(self, logger: MainLogger):
      assert isinstance(logger, MainLogger)
      log_history = logger.log_history
      assert log_history.get("loss") is not None
  
file_path: livelossplot/tests/external_test_poutyne.py
imports: import torch
  from torch import nn, optim
  from torch.utils.data import TensorDataset, DataLoader
  from poutyne import Model
  from livelossplot import MainLogger, PlotLossesPoutyne
  from livelossplot.outputs import BaseOutput
label_desc: Use image node_id 1 for calling the CheckOutput obj's underlying member method code with example usage: obj.send(logger) without return types