rem: unregister: function(responderToRemove) { this.responders = this.responders.without(responderToRemove); 
add: unregister: function(responder) { this.responders = this.responders.without(responder); 
context:   unregister: function(responderToRemove) {    this.responders = this.responders.without(responderToRemove);  },
meta: 4707	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/4707/50c3492c4c3c825dbd3401e134a19ed46799c456/prototype.js/clean/www/resources/prototype/prototype.js