async def get(self,request_configuration: Optional[RequestConfiguration[EventItemRequestBuilderGetQueryParameters]] = None) -> Optional[Event]:
        """
        Contains the id property values of the event instances that are exceptions in a recurring series.Exceptions can differ from other occurrences in a recurring series, such as the subject, start or end times, or attendees. Exceptions don't include canceled occurrences.Returned only on $select and $expand in a GET operation that specifies the ID (seriesMasterId property value) of a series master event.
        param request_configuration: Configuration for the request such as headers, query parameters, and middleware options.
        Returns: Optional[Event]
        """
        request_info = self.to_get_request_information(
            request_configuration
        )
        from .........models.o_data_errors.o_data_error import ODataError

        error_mapping: dict[str, type[ParsableFactory]] = {
            "XXX": ODataError,
        }
        if not self.request_adapter:
            raise Exception("Http core is null") 
        from .........models.event import Event

        return await self.request_adapter.send_async(request_info, Event, error_mapping)

        Contains the id property values of the event instances that are exceptions in a recurring series.Exceptions can differ from other occurrences in a recurring series, such as the subject, start or end times, or attendees. Exceptions don't include canceled occurrences.Returned only on $select and $expand in a GET operation that specifies the ID (seriesMasterId property value) of a series master event.
        param request_configuration: Configuration for the request such as headers, query parameters, and middleware options.
        Returns: Optional[Event]
        
msgraph/generated/groups/item/events/item/instances/item/exception_occurrences/item/event_item_request_builder.py