text: "use strict";
  var __extends = (this && this.__extends) || (function () {
      var extendStatics = Object.setPrototypeOf ||
          ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
          function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
      return function (d, b) {
          extendStatics(d, b);
          function __() { this.constructor = d; }
          d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
      };
  })();
  exports.__esModule = true;
  exports["default"] = function () {
  };
  //let x: number[]
  var x = [0, 1, null];
  var Animal = (function () {
      function Animal() {
      }
      return Animal;
  }());
  var Rhino = (function (_super) {
      __extends(Rhino, _super);
      function Rhino() {
          return _super !== null && _super.apply(this, arguments) || this;
      }
      return Rhino;
  }(Animal));
  var Elephant = (function (_super) {
      __extends(Elephant, _super);
      function Elephant() {
          return _super !== null && _super.apply(this, arguments) || this;
      }
      return Elephant;
  }(Animal));
  var Snake = (function (_super) {
      __extends(Snake, _super);
      function Snake() {
          return _super !== null && _super.apply(this, arguments) || this;
      }
      return Snake;
  }(Animal));
  var zoo = [new Elephant(), new Snake(), new Rhino()];
  