code: def test_background_gradient_int64():
      # GH 28869
      df1 = Series(range(3)).to_frame()
      df2 = Series(range(3), dtype="Int64").to_frame()
      ctx1 = df1.style.background_gradient()._compute().ctx
      ctx2 = df2.style.background_gradient()._compute().ctx
      assert ctx2[(0, 0)] == ctx1[(0, 0)]
      assert ctx2[(1, 0)] == ctx1[(1, 0)]
      assert ctx2[(2, 0)] == ctx1[(2, 0)]
  
imports: import gc
  import numpy
  import pytest
  from pandas import DataFrame, IndexSlice, Series
  import matplotlib
  from pandas.io.formats.style import Styler
label_desc: Use image node_id 11 for calling a global function with example usage: test_background_gradient_int64() without return types