docs: def load_stack(stack):
      """
      Loads the saved state of a CallStack and returns a whole instance given an instance with incomplete state.
  
      :param caliendo.hooks.CallStack stack: The stack to load
  
      :returns: A CallStack previously built in the context of a patch call.
      :rtype: caliendo.hooks.CallStack
  
      """
      global CACHE_
      load_cache(True)
      key = "{0}.{1}".format(stack.module, stack.caller)
      if key in CACHE_['stacks']:
          return pickle.loads(CACHE_['stacks'][key])