add: return this; 
context:   each: function(iterator) {    var index = 0;    try {      this._each(function(value) {        try {          iterator(value, index++);        } catch (e) {          if (e != $continue) throw e;        }      });    } catch (e) {      if (e != $break) throw e;    }  },
meta: 4707	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/4707/50c3492c4c3c825dbd3401e134a19ed46799c456/prototype.js/clean/www/resources/prototype/prototype.js