async def get(self,request_configuration: Optional[RequestConfiguration[InstancesRequestBuilderGetQueryParameters]] = None) -> Optional[EventCollectionResponse]:
        """
        The occurrences of a recurring series, if the event is a series master. This property includes occurrences that are part of the recurrence pattern, and exceptions modified, but doesn't include occurrences canceled from the series. Navigation property. Read-only. Nullable.
        param request_configuration: Configuration for the request such as headers, query parameters, and middleware options.
        Returns: Optional[EventCollectionResponse]
        """
        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_collection_response import EventCollectionResponse

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

        The occurrences of a recurring series, if the event is a series master. This property includes occurrences that are part of the recurrence pattern, and exceptions modified, but doesn't include occurrences canceled from the series. Navigation property. Read-only. Nullable.
        param request_configuration: Configuration for the request such as headers, query parameters, and middleware options.
        Returns: Optional[EventCollectionResponse]
        
msgraph/generated/users/item/calendar_groups/item/calendars/item/events/item/instances/instances_request_builder.py