@Override
      void process(Project project, VcsKey vcsKey, ChangelistBuilder builder,
        HgRevisionNumber currentNumber, HgRevisionNumber parentRevision,
        HgFile beforeFile, HgFile afterFile) {
        processChange(
          HgContentRevision.create(project, beforeFile, parentRevision),
          HgCurrentContentRevision.create(afterFile, currentNumber),
          FileStatus.MODIFIED,
          builder,
          vcsKey
        );
      }
@Override
      void process(Project project, VcsKey vcsKey, ChangelistBuilder builder,
        HgRevisionNumber currentNumber, HgRevisionNumber parentRevision,
        HgFile beforeFile, HgFile afterFile)