code: def test_dict_to_string(self):
      dictionary = {"one": 1, "two": 2, "three": 3}
      expected = "one: 1.0000, two: 2.0000, three: 3.0000"
  
      self.assertEqual(dict_to_string(dictionary), expected)
  
imports: import unittest
  from mmf.utils.general import dict_to_string, get_overlap_score
label_desc: Use image node_id 1 for calling the TestUtilsGeneral obj's underlying member method code with example usage: obj.test_dict_to_string() without return types