static boolean isCanFlip(PsiElement left, PsiElement right) {
      final Language language = left.getLanguage();
      for (Flipper handler : EXTENSION.allForLanguage(language)) {
        if (!handler.canFlip(left, right)) {
          return false;
        }
      }
      return true;
    }
static boolean isCanFlip(PsiElement left, PsiElement right)