def by_section_group_id1(self,section_group_id1: str) -> SectionGroupItemRequestBuilder:
        """
        Provides operations to manage the sectionGroups property of the microsoft.graph.sectionGroup entity.
        param section_group_id1: The unique identifier of sectionGroup
        Returns: SectionGroupItemRequestBuilder
        """
        if section_group_id1 is None:
            raise TypeError("section_group_id1 cannot be null.")
        from .item.section_group_item_request_builder import SectionGroupItemRequestBuilder

        url_tpl_params = get_path_parameters(self.path_parameters)
        url_tpl_params["sectionGroup%2Did1"] = section_group_id1
        return SectionGroupItemRequestBuilder(self.request_adapter, url_tpl_params)

        Provides operations to manage the sectionGroups property of the microsoft.graph.sectionGroup entity.
        param section_group_id1: The unique identifier of sectionGroup
        Returns: SectionGroupItemRequestBuilder
        
msgraph/generated/groups/item/sites/item/onenote/notebooks/item/section_groups/item/section_groups/section_groups_request_builder.py