rem: var selectedMessages = GetSelectedMessages(); var compositeDataSource = GetCompositeDataSource("MarkMessageFlagged"); 
add: var selectedMessages = GetSelectedMessages(); var compositeDataSource = GetCompositeDataSource("MarkMessageFlagged"); 
context: function MsgMarkAsFlagged(markFlagged){	if(markFlagged == null)	{		markFlagged= !SelectedMessagesAreFlagged();	}	var selectedMessages = GetSelectedMessages();	var compositeDataSource = GetCompositeDataSource("MarkMessageFlagged");	MarkMessagesFlagged(compositeDataSource, selectedMessages, markFlagged);}
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