How do I determine object that function is a method of?
<pre><code>var A = {
    x : function () { }
};

var b = function (method) {
    //want to know method's "parent" here
};

b(A.x);
</code></pre>

<p>I want to know that x is defined in A when I call the b(A.x). Is this possible?</p>
