[coldbox 3.5.3] Messaging Callback Function needs ColdBox Settings: How to accomplish that ?

In a messaging callback function, I want to access some ColdBox settings; but in this isolated callback function, I do NOT have the ColdBox Framework at my fingertips out of the box ! So I cannot use getSetting(“key”), for instance. Is there a way to make ColdBox functionality available for functions the callstack of which has no ColdBox-related origin ? Or do I have to go another route for such functions ? Not using any ColdBox functionality at all ? And perhaps using the CFML application scope to provide all needed information ?