@Override
    public Library @NotNull [] getLibraries(@NotNull final LibraryLevel libraryLevel) {
      LibraryTableModifiableModelProvider provider = getProvider(libraryLevel);
      return provider != null ? provider.getModifiableModel().getLibraries() : EMPTY_LIBRARIES_ARRAY;
    }
@Override
    public Library @NotNull [] getLibraries(@NotNull final LibraryLevel libraryLevel)