==== tests/cases/compiler/overloadingOnConstants1.ts (4 errors) ====
    class Base { foo() { } }
    class Derived1 extends Base { bar() { } }
    class Derived2 extends Base { baz() { } }
    class Derived3 extends Base { biz() { } }
    
    interface Document2 {
        createElement(tagName: 'canvas'): Derived1;
        createElement(tagName: 'div'): Derived2;
        createElement(tagName: 'span'): Derived3;
        createElement(tagName: string): Base;
    }
    
    var d2: Document2;
    
    // these are ok
    var htmlElement: Base = d2.createElement("yo")
    var htmlCanvasElement: Derived1 = d2.createElement("canvas");
    var htmlDivElement: Derived2 = d2.createElement("div");
    var htmlSpanElement: Derived3 = d2.createElement("span");
    
    // these are errors
    var htmlElement2: Derived1 = d2.createElement("yo")
        ~~~~~~~~~~~~
!!! Type 'Base' is not assignable to type 'Derived1':
!!!   Property 'bar' is missing in type 'Base'.
    var htmlCanvasElement2: Derived3 = d2.createElement("canvas");
        ~~~~~~~~~~~~~~~~~~
!!! Type 'Derived1' is not assignable to type 'Derived3':
!!!   Property 'biz' is missing in type 'Derived1'.
    var htmlDivElement2: Derived1 = d2.createElement("div");
        ~~~~~~~~~~~~~~~
!!! Type 'Derived2' is not assignable to type 'Derived1':
!!!   Property 'bar' is missing in type 'Derived2'.
    var htmlSpanElement2: Derived1 = d2.createElement("span");
        ~~~~~~~~~~~~~~~~
!!! Type 'Derived3' is not assignable to type 'Derived1':
!!!   Property 'bar' is missing in type 'Derived3'.