Amid a flurry of Dublin restaurant closures in recent months, restaurateurs want people to know they tried to warn you. On Wednesday, Dublin’s Ukiyo bar and restaurant became the latest landmark in the city to close its doors for good. In a message to customers, the bar’s owners said that after 20 years of serving the people of Dublin, its profit margins have become “so meagre that there is no future for us and so many more of our fellow businesses”. “Three more of our neighbours closed last week; we are all within 50 metres of each other, all respected,…