def by_protection_unit_base_id(self,protection_unit_base_id: str) -> ProtectionUnitBaseItemRequestBuilder:
        """
        Provides operations to manage the protectionUnits property of the microsoft.graph.backupRestoreRoot entity.
        param protection_unit_base_id: The unique identifier of protectionUnitBase
        Returns: ProtectionUnitBaseItemRequestBuilder
        """
        if protection_unit_base_id is None:
            raise TypeError("protection_unit_base_id cannot be null.")
        from .item.protection_unit_base_item_request_builder import ProtectionUnitBaseItemRequestBuilder

        url_tpl_params = get_path_parameters(self.path_parameters)
        url_tpl_params["protectionUnitBase%2Did"] = protection_unit_base_id
        return ProtectionUnitBaseItemRequestBuilder(self.request_adapter, url_tpl_params)

        Provides operations to manage the protectionUnits property of the microsoft.graph.backupRestoreRoot entity.
        param protection_unit_base_id: The unique identifier of protectionUnitBase
        Returns: ProtectionUnitBaseItemRequestBuilder
        
msgraph/generated/solutions/backup_restore/protection_units/protection_units_request_builder.py