I have single entry Swiss Visa and a Singapore-Zurich-Singapore SQ flight.I would like to visit Italy before I go back to Singapore.I also have a Schengen Visa. Can I get to my Zurich-Singapore flight without being asked for a Swiss Visa if I am flying in from Italy on the same day?Meaning I would not be going out of the Swiss airport. After landing from Italy, do I have to pass through Swiss immigration, get my luggage,check in for my Singapore flight and go through immigration again? Thanks in advance for the help!