code: def fill_suite(unit_container_suite):
      unit_container_suite.addTests(
          unittest.TestLoader().loadTestsFromModule(
              container_cftree_unit_tests
          )
      )
      unit_container_suite.addTests(
          unittest.TestLoader().loadTestsFromModule(
              container_kdtree_unit_tests
          )
      )
  
imports: import unittest
  from pyclustering.tests.suite_holder import suite_holder
  from pyclustering.container.tests.unit import ut_cftree
  from pyclustering.container.tests.unit import ut_kdtree
label_desc: Use image node_id 2 for calling the container_unit_tests obj's underlying member method code with example usage: obj.fill_suite(unit_container_suite) without return types