def METHOD_NAME(self):
    """
    Django 2.1 supports null=(True|False) for BooleanField.
    """
    class BoolModel2(models.Model):
        field = models.BooleanField(null=True)
        class Meta:
            app_label = "django_tables2_test"
    class Table(tables.Table):
        class Meta:
            model = BoolModel2
    column = Table.base_columns["field"]
    self.assertEqual(type(column), tables.BooleanColumn)
    self.assertEqual(column.empty_values, (None, ""))