code: def test_early_stop_train_loss(self):
      def _train_func(engine, batch):
          return {"loss": 1.5}
  
      trainer = Engine(_train_func)
      EarlyStopHandler(
          patience=5,
          score_function=lambda x: x.state.output["loss"],
          trainer=trainer,
          epoch_level=False,
      ).attach(trainer)
  
      trainer.run(range(4), max_epochs=2)
      self.assertEqual(trainer.state.iteration, 6)
      self.assertEqual(trainer.state.epoch, 2)
  
file_path: MONAI/tests/test_handler_early_stop.py
imports: from __future__ import annotations
  import unittest
  from ignite.engine import Engine, Events
  from monai.handlers import EarlyStopHandler
label_desc: Use image node_id 1 for calling the TestHandlerEarlyStop obj's underlying member method code with example usage: obj.test_early_stop_train_loss() and returns: dict