code: def test_order_by_no_dependency(self):
      sorted_arr = list(
          trackable_utils.order_by_dependency(
              {x: [] for x in range(15)}
          )
      )
      self.assertEqual(set(sorted_arr), set(range(15)))
  
imports: from tensorflow.python.eager import test
  from tensorflow.python.trackable import trackable_utils
label_desc: Use image node_id 2 for calling the TrackableUtilsTest obj's underlying member method code with example usage: obj.test_order_by_no_dependency() without return types