rem: K: function(x) {return x} 
add: K: function(x) { return x } 
context:   K: function(x) {return x}
meta: 2801	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/2801/7e143d2df37946a5416f0f043869478087652eb6/prototype.js/clean/examples/testcases/prototype.js