    def dump(cls, cfg, savepath=None):
        """dump cfg to `json` file.

        Args:
            cfg (dict): The dict to dump.
            savepath (str): The filepath to save the dumped dict.

        Returns: TODO

        """
        if savepath is None:
            savepath = osp.join(cfg.WORKSPACE, "config.json")
        json.dump(cfg, open(savepath, "w"), indent=2)
dump cfg to `json` file.

Args:
cfg (dict): The dict to dump.
savepath (str): The filepath to save the dumped dict.

Returns: TODO
videomamba/video_mm/utils/config.py