code: def testListOfListInteger(self):
      self.templatePackUnpack([[1, 2, 3], [4, 5, 6], [7, 8, 9]])
  
imports: import unittest
  import numpy
  from pyclustering.core.pyclustering_package import package_builder, package_extractor
  from ctypes import c_ulong, c_size_t, c_double, c_uint, c_float, c_char_p
label_desc: Use image node_id 11 for calling the Test obj's underlying member method code with example usage: obj.testListOfListInteger() without return types