public static @NotNull @Unmodifiable List<PsiFile> toPsiFiles(@NotNull PsiManager psiManager, @NotNull Collection<? extends VirtualFile> virtualFiles) {
    return ContainerUtil.mapNotNull(virtualFiles, psiManager::findFile);
  }
public static @NotNull @Unmodifiable List<PsiFile> toPsiFiles(@NotNull PsiManager psiManager, @NotNull Collection<? extends VirtualFile> virtualFiles)