@Nullable
  public LibraryCompositionSettings getLibraryCompositionSettings() {
    if (myLibraryCompositionSettings == null && myLibraryOptionsPanel != null) {
      myLibraryCompositionSettings = myLibraryOptionsPanel.apply();
    }
    return myLibraryCompositionSettings;
  }
@Nullable
  public LibraryCompositionSettings getLibraryCompositionSettings()