With Xcode 6.3 there were new annotations introduced for better expressing the intention of API's in Objective-C (and to ensure better Swift support of course). Those annotations were of course nonnull, nullable and null_unspecified. But with Xcode 7, there is a lot of warnings appearing such as: Pointer is missing a nullability type specifier (_Nonnull, _Nullable or _Null_unspecified). In additio