rem: fragments.each((function(fragment) { this.element.appendChild(fragment); }).bind(this)); 
add: $H(extras).each(function(pair) { headers[pair.key] = pair.value }); 
context:     fragments.each((function(fragment) {      this.element.appendChild(fragment);    }).bind(this));
meta: 2801	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/2801/7e143d2df37946a5416f0f043869478087652eb6/prototype.js/clean/examples/testcases/prototype.js