rem: for(var i = 0; i < this.observers.length; i++) this.observers[i][eventName](draggable); 
add: this.observers.invoke(eventName, draggable); 
context:   notify: function(eventName, draggable) {  // 'onStart', 'onEnd'    for(var i = 0; i < this.observers.length; i++)      this.observers[i][eventName](draggable);  }
meta: 2355	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/2355/9867ca01ad65827d23c0bf6cc14d8a64137e927d/dragdrop.js/clean/tracks/public/javascripts/dragdrop.js