WALA/com.ibm.wala.cast.js.test.data/examples-src/tests/wrap2.js

Function.prototype.wrap = function f_wrap(){
	var self = this;
	return function wrapper(x, y, z){
	    return (function wrapper_inner() { self(x, y, z); })();
	};
};


var extend = function f_extend(thi$, key, value){
	thi$[key] = value;
}.wrap();

extend(Number, 'g', function i_am_reachable(x){ return x+19; });

Number.g(23);