@Override
  @Nullable
  public ModuleConfigurationEditor getEditor(@NotNull String displayName) {
    ModuleConfigurationEditor singleEditor = getSingleEditor();
    if (singleEditor != null) {
      if (displayName.equals(singleEditor.getDisplayName())) {
        return singleEditor;
      }
      else {
        return null;
      }
    }
    else {
      return super.getEditor(displayName);
    }
  }
@Override
  @Nullable
  public ModuleConfigurationEditor getEditor(@NotNull String displayName)