code: def test_fillna_series_empty_arg_inplace(using_copy_on_write):
      ser = Series([1, np.nan, 2])
      arr = get_array(ser)
      ser.fillna({}, inplace=True)
  
      assert np.shares_memory(get_array(ser), arr)
      if using_copy_on_write:
          assert ser._mgr._has_no_reference(0)
  
imports: import numpy
  import pytest
  from pandas import NA, ArrowDtype, DataFrame, Interval, NaT, Series, Timestamp, interval_range, option_context
  import pandas._testing
  from pandas.tests.copy_view.util import get_array
label_desc: Use image node_id 18 for calling a global function with example usage: test_fillna_series_empty_arg_inplace(using_copy_on_write) without return types