code: def test_to_dense(self):
      ser = pd.Series([0, 1, 0, 10], dtype="Sparse[int64]")
      result = ser.sparse.to_dense()
      expected = pd.Series([0, 1, 0, 10])
      tm.assert_series_equal(result, expected)
  
imports: import string
  import numpy
  import pytest
  import pandas
  from pandas import SparseDtype
  import pandas._testing
  from pandas.core.arrays.sparse import SparseArray
label_desc: Use image node_id 1 for calling the TestSeriesAccessor obj's underlying member method code with example usage: obj.test_to_dense() without return types