private static @Nullable PsiPolyadicExpression getInnerExpression(@NotNull PsiParenthesizedExpression parenthesized,
                                                                    @NotNull Set<IElementType> innerOperators) {
    PsiPolyadicExpression expression = ObjectUtils.tryCast(PsiUtil.skipParenthesizedExprDown(parenthesized), PsiPolyadicExpression.class);
    if (expression == null) return null;
    if (!innerOperators.contains(expression.getOperationTokenType()) || expression.getOperands().length < 2) return null;
    return expression;
  }
private static @Nullable PsiPolyadicExpression getInnerExpression(@NotNull PsiParenthesizedExpression parenthesized,
                                                                    @NotNull Set<IElementType> innerOperators)