Getting hold of an AbstractService instance from op. part.

Hi,
It's probably a really dumb question, but I am writing a WorkItem save Operation Participant, and I want to get hold of an ITeamBuildRequestService instance. Now I know AbstractService.getService() will give me that but I don't know how to get hold of an AbstractService implementing object from inside the participant.

Currently I'm doing something similar to the following, but it's deprecated so I'd like to do it the intended way but unable to work out how to get an AbstractService instance.

public void run(final AdvisableOperation operation, final IProcessConfigurationElement participantConfig, final IParticipantInfoCollector collector, final IProgressMonitor monitor)

            throws TeamRepositoryException

{

    final ISaveParameter saveParameter = (ISaveParameter) operation.getData();

    final IAuditableCommon auditableCommon = saveParameter.getSaveOperationParameter().getAuditableCommon();

    final IWorkItemServer = auditableCommon.getPeer(IWorkItemServer.class); // deprecated call

    final IAuditableServer auditableServer = workItemServer.getAuditableServer();

    final ITeamBuildRequestService buildService = auditableServer.getService(ITeamBuildRequestService.class) // deprecated call



    // ...

}

Any help would be appreciated as I'm sure the answer is obvious - I had thought about having my OperationPartipant extend AbstractService, but that doesn't seem right as the participant isn't a service.

Thanks,
Dan