A question about clearing issuedMessages

I see that **issuedMessages** are piling up, and although on each add new there is
```
        for (CharSequence cs : issuedMessages) {
            inboxStyle.addLine(cs);
        }
```
removed notifications somehow do not re-appear as new, which is ok. 
My question is, how should we clear that removed (swipe away or tap-to)
messages from that **issuedMessages** list ?