Update Build Definitions that match with a pattern

Hello,

I need update the properties of some Builds Definitions which ID match with a pattern.

I've wrote a program that find the Build Definitions and get the properties that I want to update by means a working copy,

but the problem is How can I save the changes in the Build Definition Object?

Here is the Program:

IBuildDefinitionQueryModel BuildDefs_QueryModel = IBuildDefinitionQueryModel.ROOT;

IItemQuery query = IItemQuery.FACTORY.newInstance(BuildDefs_QueryModel);
query.filter(BuildDefs_QueryModel.id()._like(query.newStringArg()));

String[] parameters = new String[] { pattern };

IProgressMonitor monitor = new NullProgressMonitor();
ITeamBuildClient buildClient = (ITeamBuildClient) teamRepository.getClientLibrary(ITeamBuildClient.class);


IItemQueryPage queryPage = buildClient.queryItems(query, parameters, IQueryService.ITEM_QUERY_MAX_PAGE_SIZE, monitor);


if (queryPage.getSize() == 0) {
System.out.println("Zero builds Definions found with pattern '" + pattern + "'");
} else {
System.out.println("Found " + queryPage.getSize() + " builds with pattern '" + pattern + "':");

List<?> buildResults = teamRepository.itemManager().fetchCompleteItems(queryPage.getItemHandles(), IItemManager.DEFAULT, monitor);


for (Object result : buildResults) {
IBuildDefinition buildDef = (IBuildDefinition) result;
System.out.println("Build: "+ buildDef.getId());
System.out.println("\t\tfetchDestination: "+ buildDef.getProperty("team.scm.fetchDestination"));


IBuildDefinition WorkCopy_buildDef = (IBuildDefinition) buildDef.getWorkingCopy();

WorkCopy_buildDef.setProperty("team.scm.fetchDestination", "My value for TEST");


System.out.println("-------------------");

}
}