@Override
 public Boolean getAddinionallyCachedData(MyHistorySession session) {
   return session.isSupports15();
 }
 private MergeSourceRenderer(final MyHistorySession session) {
   myFile = session.getCommittedPath().getVirtualFile();
 }
 @Override
 public FilePath getUsedFilePath(MyHistorySession session) {
   return session.getCommittedPath();
 }