code: def test_round_to_k_5(self):
      x = 0.123456789
      expected_r_x = 0.123
      assert round_to_k(x, 3) == expected_r_x
  
file_path: shapash/tests/unit_tests/webapp/utils/test_utils.py
imports: import unittest
  from shapash.webapp.utils.utils import round_to_k
label_desc: Use image node_id 5 for calling the TestUtils obj's underlying member method code with example usage: obj.test_round_to_k_5() without return types