@Override
  public @NotNull List<VirtualFile> getDirectoriesByPackageName(final @NotNull String packageName) {
    PackageInfo info = getPackageInfo(packageName);
    return info == null ? Collections.emptyList() : Collections.unmodifiableList(info.myPackageDirectories);
  }
@Override
  public @NotNull List<VirtualFile> getDirectoriesByPackageName(final @NotNull String packageName)