Retrieve repository files for a given snapshot

I was trying to obtain repository files from a snapshot, which I obtained from the build result. The following code demonstrate what I tried to do:

IBuildResultContribution[] contributionsSnapShot = ClientFactory.getTeamBuildClient(teamRepository).getBuildResultContributions(buildResult, ScmConstants.EXTENDED_DATA_TYPE_ID_BUILD_SNAPSHOT, monitor);
for (IBuildResultContribution snapShotContribution : contributionsSnapShot) {
System.out.println(snapShotContribution.getExtendedContributionTypeId());
IItemHandle snapShotItemHanler = snapShotContribution.getExtendedContribution();
BaselineSet set = (BaselineSet) teamRepository.itemManager().fetchCompleteItem(snapShotItemHanler, 0, monitor);
System.out.println(set.getName());
for(Object baseline : baselines)
{
System.out.println(baseline.toString());
}

}


The question is how do I get the correct version of repository files which are "marked" by the known snapshot? What APIs do I need to use? I couldn't find any more documentation for the RTC SDK plain Java APIs.

Thanks a lot.