def by_calendar_id(self,calendar_id: str) -> CalendarItemRequestBuilder:
        """
        Provides operations to manage the calendars property of the microsoft.graph.user entity.
        param calendar_id: The unique identifier of calendar
        Returns: CalendarItemRequestBuilder
        """
        if calendar_id is None:
            raise TypeError("calendar_id cannot be null.")
        from .item.calendar_item_request_builder import CalendarItemRequestBuilder

        url_tpl_params = get_path_parameters(self.path_parameters)
        url_tpl_params["calendar%2Did"] = calendar_id
        return CalendarItemRequestBuilder(self.request_adapter, url_tpl_params)

        Provides operations to manage the calendars property of the microsoft.graph.user entity.
        param calendar_id: The unique identifier of calendar
        Returns: CalendarItemRequestBuilder
        
msgraph/generated/users/item/calendars/calendars_request_builder.py