add: var calendar = createCalendar(); 
context: function finishCalendarToDoUnifinder(){    calendar.removeObserver(unifinderToDoDataSourceObserver);}
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/cdf001b203f249bc1f5451e4f2d6fe7d62635de7/unifinderToDo.js/buggy/calendar/resources/content/unifinderToDo.js