code: def call_list(self):
          
          vals = []
          thing = self
          while thing is not None:
              if thing.from_kall:
                  vals.append(thing)
              thing = thing.parent
          return _CallList(reversed(vals))
docs: For a call object that represents multiple calls, `call_list`
          returns a list of all the intermediate calls as well as the
          final call.