code: def fill_suite(unit_suite):
      unit_suite.addTests(
          unittest.TestLoader().discover(
              __PYCLUSTERING_ROOT_DIRECTORY__, "ut_*.py"
          )
      )
  
imports: import enum
  import sys
  import unittest
  import warnings
  import matplotlib
  from pyclustering.tests.suite_holder import suite_holder
  from pyclustering import __PYCLUSTERING_ROOT_DIRECTORY__
label_desc: Use image node_id 2 for calling the pyclustering_unit_tests obj's underlying member method code with example usage: obj.fill_suite(unit_suite) without return types