@Override
      protected void applyFix(@NotNull Project project, @NotNull PsiElement element, @NotNull ModPsiUpdater updater) {
        element = element.getParent();
        if (element instanceof RegExpClass regExpClass) {
          final RegExpClassElement[] elements = regExpClass.getElements();
          final PsiElement parent = regExpClass.getParent();
          for (RegExpClassElement classElement : elements) {
            parent.addBefore(classElement, regExpClass);
          }
          regExpClass.delete();
        }
      }
@Override
      protected void applyFix(@NotNull Project project, @NotNull PsiElement element, @NotNull ModPsiUpdater updater)