public ExistingLibraryEditor getOrCreateEditor(@NotNull Library library) {
    ExistingLibraryEditor libraryEditor = myExistingLibraryEditors.get(library);
    if (libraryEditor == null) {
      libraryEditor = new ExistingLibraryEditor(library, null);
      Disposer.register(this, libraryEditor);
      myExistingLibraryEditors.put(library, libraryEditor);
    }
    return libraryEditor;
  }
public ExistingLibraryEditor getOrCreateEditor(@NotNull Library library)