text: function _classCallCheck(instance, Constructor) {
      if (!(instance instanceof Constructor)) {
          throw new TypeError("Cannot call a class as a function");
      }
  }
  // all of these are valid
  var x;
  x = 1;
  var a = 2;
  x = a;
  x = true;
  var b = true;
  x = b;
  x = "";
  var c = "";
  x = c;
  var d;
  x = d;
  var e = undefined;
  x = e;
  var e2;
  x = e2;
  var E;
  (function(E) {
      E[E["A"] = 0] = "A";
  })(E || (E = {}));
  x = E.A;
  var f = E.A;
  x = f;
  var g;
  x = g;
  var C = function C() {
      "use strict";
      _classCallCheck(this, C);
  };
  var h;
  x = h;
  var i;
  x = i;
  x = {
      f: function f() {
          return 1;
      }
  };
  x = {
      f: function f(x1) {
          return x1;
      }
  };
  function j(a1) {
      x = a1;
  }
  