text: function _classCallCheck(instance, Constructor) {
      if (!(instance instanceof Constructor)) throw new TypeError("Cannot call a class as a function");
  }
  var M, C = function() {
      "use strict";
      _classCallCheck(this, C);
  }, D = function() {
      "use strict";
      _classCallCheck(this, D);
  };
  !function(M1) {
      var A = function() {
          "use strict";
          _classCallCheck(this, A);
      };
      M1.A = A, M1.F2 = function(x) {
          return x.toString();
      };
  }(M || (M = {
  })), new Date(12), new Object(), new C(), new C(), new D(), new M.A(), M.F2;
  