code: def __init__(self, prediction_length: int, num_val_windows: int = 1):
      self.prediction_length = prediction_length
      self.num_val_windows = num_val_windows
  
file_path: autogluon/timeseries/src/autogluon/timeseries/splitter.py
imports: from typing import Iterator, Optional, Tuple
  from .dataset.ts_dataframe import TimeSeriesDataFrame
label_desc: Use image node_id 1 to create a new AbstractWindowSplitter object  with example: obj = AbstractWindowSplitter(prediction_length, num_val_windows)