code: def test_cached_attribute_name_differs_from_func_name():
      item = OptionallyCachedCostItem()
      assert item.get_cost() == 2
      assert item.cached_cost == 3
      assert item.get_cost() == 4
      assert item.cached_cost == 3
  
imports: import concurrent.futures
  import sys
  import threading
  import pytest
  from flash.core.serve._compat.cached_property import cached_property
  from flash.core.utilities.imports import _TOPIC_SERVE_AVAILABLE
label_desc: Use image node_id 2 for calling the TestCachedProperty obj's underlying member method code with example usage: obj.test_cached_attribute_name_differs_from_func_name() without return types