<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _load_root_directory(self):
 """ Load root directory, which has a cid of 0 """

        kwargs = self._req_directory(0)
        self._root_directory = Directory(api=self, **kwargs)