def last_index_operation(self) -> LastIndexOperationRequestBuilder:
        """
        Provides operations to manage the lastIndexOperation property of the microsoft.graph.security.ediscoveryNoncustodialDataSource entity.
        """
        from .last_index_operation.last_index_operation_request_builder import LastIndexOperationRequestBuilder

        return LastIndexOperationRequestBuilder(self.request_adapter, self.path_parameters)

        Provides operations to manage the lastIndexOperation property of the microsoft.graph.security.ediscoveryNoncustodialDataSource entity.
        
msgraph/generated/security/cases/ediscovery_cases/item/noncustodial_data_sources/item/ediscovery_noncustodial_data_source_item_request_builder.py