code: def test(self):
      case1 = dx.datasets.load_fifa()
      case2 = dx.datasets.load_titanic()
      case3 = dx.datasets.load_apartments()
      case4 = dx.datasets.load_apartments_test()
      case5 = dx.datasets.load_hr()
      case6 = dx.datasets.load_hr_test()
      case7 = dx.datasets.load_dragons()
      case8 = dx.datasets.load_dragons_test()
  
      self.assertIsInstance(case1, pd.DataFrame)
      self.assertIsInstance(case2, pd.DataFrame)
      self.assertIsInstance(case3, pd.DataFrame)
      self.assertIsInstance(case4, pd.DataFrame)
      self.assertIsInstance(case5, pd.DataFrame)
      self.assertIsInstance(case6, pd.DataFrame)
      self.assertIsInstance(case7, pd.DataFrame)
      self.assertIsInstance(case8, pd.DataFrame)
  
imports: import unittest
  import dalex
  import pandas
label_desc: Use image node_id 2 for calling the DatasetsTest obj's underlying member method code with example usage: obj.test() without return types