[ios] Realm debug snippet

Feb 12, 2018

realm file in simulator file:///Users/hslee/Library/Developer/CoreSimulator/Devices/10945933-63A7-4C2E-875B-7023A6820B39/data/Containers/Data/Application/1EEB0045-4451-4238-B887-38AFC3D1256F/Documents/default.realm