text: //// [overloadingOnConstants1.ts]
  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")
  var htmlCanvasElement2: Derived3 = d2.createElement("canvas");
  var htmlDivElement2: Derived1 = d2.createElement("div");
  var htmlSpanElement2: Derived1 = d2.createElement("span");
  
  //// [overloadingOnConstants1.js]
  var __extends = this.__extends || function (d, b) {
      for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
      function __() { this.constructor = d; }
      __.prototype = b.prototype;
      d.prototype = new __();
  };
  var Base = (function () {
      function Base() {
      }
      Base.prototype.foo = function () {
      };
      return Base;
  })();
  var Derived1 = (function (_super) {
      __extends(Derived1, _super);
      function Derived1() {
          _super.apply(this, arguments);
      }
      Derived1.prototype.bar = function () {
      };
      return Derived1;
  })(Base);
  var Derived2 = (function (_super) {
      __extends(Derived2, _super);
      function Derived2() {
          _super.apply(this, arguments);
      }
      Derived2.prototype.baz = function () {
      };
      return Derived2;
  })(Base);
  var Derived3 = (function (_super) {
      __extends(Derived3, _super);
      function Derived3() {
          _super.apply(this, arguments);
      }
      Derived3.prototype.biz = function () {
      };
      return Derived3;
  })(Base);
  var d2;
  // these are ok
  var htmlElement = d2.createElement("yo");
  var htmlCanvasElement = d2.createElement("canvas");
  var htmlDivElement = d2.createElement("div");
  var htmlSpanElement = d2.createElement("span");
  // these are errors
  var htmlElement2 = d2.createElement("yo");
  var htmlCanvasElement2 = d2.createElement("canvas");
  var htmlDivElement2 = d2.createElement("div");
  var htmlSpanElement2 = d2.createElement("span");
  