@Override
  public boolean isValid(@NotNull String url, @NotNull OrderRootType orderRootType) {
    final Collection<LightFilePointer> pointers = myRoots.get(orderRootType);
    for (LightFilePointer pointer : pointers) {
      if (pointer.getUrl().equals(url)) {
        return pointer.isValid();
      }
    }
    return false;
  }
@Override
  public boolean isValid(@NotNull String url, @NotNull OrderRootType orderRootType)