def by_event_id1(self,event_id1: str) -> EventItemRequestBuilder:
        """
        Provides operations to manage the exceptionOccurrences property of the microsoft.graph.event entity.
        param event_id1: The unique identifier of event
        Returns: EventItemRequestBuilder
        """
        if event_id1 is None:
            raise TypeError("event_id1 cannot be null.")
        from .item.event_item_request_builder import EventItemRequestBuilder

        url_tpl_params = get_path_parameters(self.path_parameters)
        url_tpl_params["event%2Did1"] = event_id1
        return EventItemRequestBuilder(self.request_adapter, url_tpl_params)

        Provides operations to manage the exceptionOccurrences property of the microsoft.graph.event entity.
        param event_id1: The unique identifier of event
        Returns: EventItemRequestBuilder
        
msgraph/generated/users/item/calendar_groups/item/calendars/item/events/item/exception_occurrences/exception_occurrences_request_builder.py