text: //// [objectTypesIdentityWithPrivates2.ts]
  // object types are identical structurally
  
  class C<T> {
      private foo: T;
  }
  
  class D<T> extends C<T> {
  }
  
  function foo1(x: C<string>);
  function foo1(x: C<number>); // ok
  function foo1(x: any) { }
  
  function foo2(x: D<string>);
  function foo2(x: D<number>); // ok
  function foo2(x: any) { }
  
  function foo3(x: C<string>);
  function foo3(x: D<number>); // ok
  function foo3(x: any) { }
  
  function foo4(x: C<number>): number; 
  function foo4(x: D<number>): string; // BUG 831926
  function foo4(x: any): any { }
  
  var r = foo4(new C<number>());
  var r = foo4(new D<number>());
  
  function foo5(x: C<number>): number;
  function foo5(x: C<number>): string; // error
  function foo5(x: any): any { }
  
  function foo6(x: D<number>): number;
  function foo6(x: D<number>): string; // error
  function foo6(x: any): any { }
  
  
  
  
  //// [objectTypesIdentityWithPrivates2.js]
  // object types are identical structurally
  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 C = (function () {
      function C() {
      }
      return C;
  })();
  
  var D = (function (_super) {
      __extends(D, _super);
      function D() {
          _super.apply(this, arguments);
      }
      return D;
  })(C);
  
  function foo1(x) {
  }
  
  function foo2(x) {
  }
  
  function foo3(x) {
  }
  
  function foo4(x) {
  }
  
  var r = foo4(new C());
  var r = foo4(new D());
  
  function foo5(x) {
  }
  
  function foo6(x) {
  }
  