==== tests/cases/compiler/overloadModifiersMustAgree.ts (5 errors) ====
    class baz {
        public foo();
               ~~~
!!! Overload signatures must all be public or private.
        private foo(bar?: any) { } // error - access modifiers do not agree
    }
    
    declare function bar();
                     ~~~
!!! Overload signatures must all be ambient or non-ambient.
    export function bar(s: string);
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
!!! Function implementation expected.
                    ~~~
!!! Overload signatures must all be exported or not exported.
    function bar(s?: string) { }
    
    interface I {
        foo? ();
        foo(s: string);
        ~~~
!!! Overload signatures must all be optional or required.
    }