@Override
  public AntBuildModelBase getModel(@NotNull AntBuildFile buildFile) {
    AntBuildModelBase model = myModelToBuildFileMap.get(buildFile);
    if (model == null) {
      synchronized (myModelToBuildFileMap) {
        model = new AntBuildModelImpl(buildFile);
        final AntBuildModelBase prev = myModelToBuildFileMap.put(buildFile, model);
        if (prev != null) {
          model = prev;
          myModelToBuildFileMap.put(buildFile, prev);
        }
      }
    }
    return model;
  }
@Override
  public AntBuildModelBase getModel(@NotNull AntBuildFile buildFile)