code: def test_init_with_invalid_input(self):
      manager = DataBalanceManager(
          train=None,
          test=None,
          target_column=None,
          classes=None,
          task_type=None,
      )
      assert manager._target_column is None
      assert manager._classes is None
      assert manager._task_type is None
      assert manager._train is None
      assert manager._test is None
      assert manager._df is None
  
imports: import pandas
  import pytest
  from pandas.testing import assert_frame_equal
  from responsibleai._interfaces import TaskType
  from responsibleai.databalanceanalysis.data_balance_utils import AGGREGATE_BALANCE_MEASURES_KEY, DISTRIBUTION_BALANCE_MEASURES_KEY, FEATURE_BALANCE_MEASURES_KEY
  from responsibleai.managers.data_balance_manager import DataBalanceManager
  from responsibleai.rai_insights.rai_insights import RAIInsights
label_desc: Use image node_id 2 for calling the TestDataBalanceManager obj's underlying member method code with example usage: obj.test_init_with_invalid_input() without return types