code: def test_prophet_serialization():
      predictor = ProphetPredictor(prediction_length=3)
      assert predictor == serde.decode(serde.encode(predictor))
  
file_path: gluonts/test/ext/prophet/test_prophet.py
imports: import numpy
  import pytest
  from gluonts.core import serde
  from gluonts.dataset.common import ListDataset
  from gluonts.ext.prophet import ProphetPredictor
label_desc: Use image node_id 4 for calling a global function with example usage: test_prophet_serialization() without return types