code: def test_fillna_mixed_float(self, mixed_float_frame):
      # mixed numeric (but no float16)
      mf = mixed_float_frame.reindex(columns=["A", "B", "D"])
      mf.loc[mf.index[-10:], "A"] = np.nan
      result = mf.fillna(value=0)
      _check_mixed_float(result, dtype={"C": None})
  
      msg = "DataFrame.fillna with 'method' is deprecated"
      with tm.assert_produces_warning(FutureWarning, match=msg):
          result = mf.fillna(method="pad")
      _check_mixed_float(result, dtype={"C": None})
  
imports: import numpy
  import pytest
  from pandas._config import using_pyarrow_string_dtype
  from pandas import Categorical, DataFrame, DatetimeIndex, NaT, PeriodIndex, Series, TimedeltaIndex, Timestamp, date_range, to_datetime
  import pandas._testing
  from pandas.tests.frame.common import _check_mixed_float
label_desc: Use image node_id 5 for calling the TestFillNA obj's underlying member method code with example usage: obj.test_fillna_mixed_float(mixed_float_frame) without return types