anchor.diff:      (let* ((a (bar)))))
     "function foo() {
       var a = bar();
  +    __PS_MV_REG = [];
       return null;
   };")
   
  
positive.code:       (baz y)))
    "function foo() {
      var y = (function () {
          return bar(this);
      }).call(this);
      return baz(y);
  };")
  
  
negative.code:   (lambda () (with-slots (a b) (foo) (+ a b)))
    "function () {
      var object1 = foo();
      __PS_MV_REG = [];
      return object1.a + object1.b;
  };")
  
  