code: def test_rolling_median_memory_error():
      # GH11722
      n = 20000
      Series(np.random.default_rng(2).standard_normal(n)).rolling(
          window=2, center=False
      ).median()
      Series(np.random.default_rng(2).standard_normal(n)).rolling(
          window=2, center=False
      ).median()
  
imports: from datetime import datetime
  import numpy
  import pytest
  import pandas.util._test_decorators
  from pandas import DataFrame, DatetimeIndex, Series, concat, isna, notna
  import pandas._testing
  from pandas.tseries import offsets
label_desc: Use image node_id 17 for calling a global function with example usage: test_rolling_median_memory_error() without return types