class_docstr: Tests that the basic interface is satisfied.
code: def test_can_hold_na_valid(self, data):
      # GH-20761
      assert data._can_hold_na is True
  
imports: import numpy
  import pytest
  from pandas.core.dtypes.cast import construct_1d_object_array_from_listlike
  from pandas.core.dtypes.common import is_extension_array_dtype
  from pandas.core.dtypes.dtypes import ExtensionDtype
  import pandas
  import pandas._testing
label_desc: Use image node_id 4 for calling the BaseInterfaceTests obj's underlying member method code with example usage: obj.test_can_hold_na_valid(data) without return types