add: props.AppendElement(aserv.getAtom(ToDoProgressAtom(calendarToDo))); 
context:    getCellProperties : function( row,column, props )   {       var aserv=Components.classes["@mozilla.org/atom-service;1"].createInstance(Components.interfaces.nsIAtomService);      if( column == "unifinder-todo-tree-col-completed" )      {         props.AppendElement(aserv.getAtom("completed"));      }      if( column == "unifinder-todo-tree-col-priority" )      {         props.AppendElement(aserv.getAtom("highpriority"));      }   },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/2b51c16c03775de67fead2f2d81f2176bbe61bf1/unifinderToDo.js/buggy/calendar/resources/content/unifinderToDo.js