async def patch(self,body: AccessReviewStage, request_configuration: Optional[RequestConfiguration[QueryParameters]] = None) -> Optional[AccessReviewStage]:
        """
        Update the properties of an accessReviewStage object. Only the reviewers and fallbackReviewers properties can be updated. You can only add reviewers to the fallbackReviewers property but can't remove existing fallbackReviewers. To update an accessReviewStage, its status must be NotStarted, Initializing, or InProgress.
        param body: The request body
        param request_configuration: Configuration for the request such as headers, query parameters, and middleware options.
        Returns: Optional[AccessReviewStage]
        Find more info here: https://learn.microsoft.com/graph/api/accessreviewstage-update?view=graph-rest-1.0
        """
        if body is None:
            raise TypeError("body cannot be null.")
        request_info = self.to_patch_request_information(
            body, 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_stage import AccessReviewStage

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

        Update the properties of an accessReviewStage object. Only the reviewers and fallbackReviewers properties can be updated. You can only add reviewers to the fallbackReviewers property but can't remove existing fallbackReviewers. To update an accessReviewStage, its status must be NotStarted, Initializing, or InProgress.
        param body: The request body
        param request_configuration: Configuration for the request such as headers, query parameters, and middleware options.
        Returns: Optional[AccessReviewStage]
        Find more info here: https://learn.microsoft.com/graph/api/accessreviewstage-update?view=graph-rest-1.0
        
msgraph/generated/identity_governance/access_reviews/definitions/item/instances/item/stages/item/access_review_stage_item_request_builder.py