code: def test_seriali_predictors(predictor):
      with tempfile.TemporaryDirectory() as temp_dir:
          predictor.serialize(Path(temp_dir))
          predictor_exp = Predictor.deserialize(Path(temp_dir))
          assert predictor == predictor_exp
  
file_path: gluonts/test/ext/naive_2/test_predictors.py
imports: import tempfile
  from pathlib import Path
  import numpy
  import pandas
  import pytest
  from flaky import flaky
  from gluonts.dataset.artificial import constant_dataset
  from gluonts.dataset.common import Dataset
  from gluonts.dataset.util import forecast_start
  from gluonts.evaluation import Evaluator, backtest_metrics
  from gluonts.ext.naive_2 import Naive2Predictor
  from gluonts.model.predictor import Predictor
  from gluonts.model.seasonal_naive import SeasonalNaivePredictor
  from gluonts.pydantic import PositiveInt
  from gluonts.time_feature import get_seasonality
label_desc: Use image node_id 4 for calling a global function with example usage: test_seriali_predictors(predictor) without return types