src/datasets/dataset_dict.py [1843:1858]:
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        configs_to_dump = {config_name: metadata_config_to_dump}
        if set_default and config_name != "default":
            if metadata_configs:
                current_default_config_name = metadata_configs.get_default_config_name()
                if current_default_config_name == "default":
                    raise ValueError(
                        "There exists a configuration named 'default'. To set a different configuration as default, "
                        "rename the 'default' one first."
                    )
                if current_default_config_name:
                    _ = metadata_configs[current_default_config_name].pop("default")
                    configs_to_dump[current_default_config_name] = metadata_configs[current_default_config_name]
            metadata_config_to_dump["default"] = True
        # push to the deprecated dataset_infos.json
        if repo_with_dataset_infos:
            dataset_infos_path = api.hf_hub_download(
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src/datasets/iterable_dataset.py [4192:4207]:
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        configs_to_dump = {config_name: metadata_config_to_dump}
        if set_default and config_name != "default":
            if metadata_configs:
                current_default_config_name = metadata_configs.get_default_config_name()
                if current_default_config_name == "default":
                    raise ValueError(
                        "There exists a configuration named 'default'. To set a different configuration as default, "
                        "rename the 'default' one first."
                    )
                if current_default_config_name:
                    _ = metadata_configs[current_default_config_name].pop("default")
                    configs_to_dump[current_default_config_name] = metadata_configs[current_default_config_name]
            metadata_config_to_dump["default"] = True
        # push to the deprecated dataset_infos.json
        if repo_with_dataset_infos:
            dataset_infos_path = api.hf_hub_download(
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