Changing tab icon dynamically doesn't work anymore

[Donatello]

Hello,

We are facing a bug since upgrade from 6.0-p20160528 to 6.0-p20171213.

We are dynamically updating the icon of a tab (in a TabSet) depending on its pane content (if there is some important data in it, we use a "critical" icon).
So at each data refresh, we are invoking this kind of code:

poiTab.setIcon(ICON_POI_LOW);
or
poiTab.setIcon(ICON_POI_CRITICAL);

The code is executed as usual, but the icon does not change anymore.
The issue can be reproduced using last Firefox 57 or Chrome 63.

Any idea ?

[Isomorphic]

Use TabSet.setTabIcon(tab, icon)

[Donatello]

Thank you Isomorphic, the provided solution worked.