==== tests/cases/compiler/overloadOnConstInObjectLiteralImplementingAnInterface.ts (2 errors) ====
    interface I {
        x1(a: number, callback: (x: 'hi') => number);
                                ~~~~~~~~~~~~~~~~~~~
!!! Specialized overload signature is not assignable to any non-specialized signature.
    }
    
    var i2: I = { x1: (a: number, cb: (x: 'hi') => number) => { } }; // error
                                      ~~~~~~~~~~~~~~~~~~~
!!! Specialized overload signature is not assignable to any non-specialized signature.