code: def test_isin_empty(self, empty):
      # see GH#16991
      s = Series(["a", "b"])
      expected = Series([False, False])
  
      result = s.isin(empty)
      tm.assert_series_equal(expected, result)
  
imports: import numpy
  import pytest
  import pandas
  from pandas import Series, date_range
  import pandas._testing
  from pandas.core import algorithms
  from pandas.core.arrays import PeriodArray
label_desc: Use image node_id 6 for calling the TestSeriesIsIn obj's underlying member method code with example usage: obj.test_isin_empty(empty) without return types