code: def fill_suite(core_suite):
      core_suite.addTests(
          unittest.TestLoader().loadTestsFromModule(
              core_package_unit_tests
          )
      )
  
imports: import unittest
  from pyclustering.tests.suite_holder import suite_holder
  import matplotlib
  from pyclustering.core.tests import ut_package
  import os
  import warnings
  from pyclustering.core.definitions import PATH_PYCLUSTERING_CCORE_LIBRARY
  from pyclustering.core.wrapper import ccore_library
label_desc: Use image node_id 2 for calling the core_tests obj's underlying member method code with example usage: obj.fill_suite(core_suite) without return types