What's the red exclamation point on the leaf in the TBrowser

When you open some root files by TBrowser, there are some red exclamation points on the green leaves. What do they mean?

Hi,

These are executable methods available when the dictionary of the class is loaded.

Cheers, Bertrand.

These leaves with red exclamation point does not show any data in TBrowser when double click on them. I have ubuntu 20.04.2 OS. Is that some graphical error? Because there was no issue while I accessed the same root file on different machine with ubuntu 18.04.5