async def get(self,request_configuration: Optional[RequestConfiguration[AccessReviewHistoryInstanceItemRequestBuilderGetQueryParameters]] = None) -> Optional[AccessReviewHistoryInstance]:
        """
        If the accessReviewHistoryDefinition is a recurring definition, instances represent each recurrence. A definition that doesn't recur will have exactly one instance.
        param request_configuration: Configuration for the request such as headers, query parameters, and middleware options.
        Returns: Optional[AccessReviewHistoryInstance]
        """
        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.access_review_history_instance import AccessReviewHistoryInstance

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

        If the accessReviewHistoryDefinition is a recurring definition, instances represent each recurrence. A definition that doesn't recur will have exactly one instance.
        param request_configuration: Configuration for the request such as headers, query parameters, and middleware options.
        Returns: Optional[AccessReviewHistoryInstance]
        
msgraph/generated/identity_governance/access_reviews/history_definitions/item/instances/item/access_review_history_instance_item_request_builder.py