修改对象的版本

VersionIdentifier vc = VersionControlHelper
      .getVersionIdentifier((Versioned) part);
    MultilevelSeries mls = vc.getSeries();
    mls.setValueWithoutValidating(version);
    VersionIdentifier newVersion = VersionIdentifier
      .newVersionIdentifier(mls);

    if (iteration == null || !(iteration.trim().equals(""))) {
     iteration = "1";
    }
    IterationIdentifier newIteration = IterationIdentifier
      .newIterationIdentifier(iteration);
    part = (WTPart) VersionControlHelper.service.newVersion(
      (Versioned) part, newVersion, newIteration);