code: def test_repr_mixed_big(self):
      # big mixed
      biggie = DataFrame(
          {
              "A": np.random.default_rng(2).standard_normal(200),
              "B": [str(i) for i in range(200)],
          },
          index=range(200),
      )
      biggie.loc[:20, "A"] = np.nan
      biggie.loc[:20, "B"] = np.nan
  
      repr(biggie)
  
imports: from datetime import datetime, timedelta
  from io import StringIO
  import numpy
  import pytest
  from pandas._config import using_pyarrow_string_dtype
  from pandas import NA, Categorical, CategoricalIndex, DataFrame, IntervalIndex, MultiIndex, NaT, PeriodIndex, Series, Timestamp, date_range, option_context, period_range
  import pandas._testing
label_desc: Use image node_id 13 for calling the TestDataFrameRepr obj's underlying member method code with example usage: obj.test_repr_mixed_big() without return types