[Interest] How to programatically make a tab's text bold?

[Vadim Peretokin]

How can I programatically make a tab's text bold? I'm looking to notify the
user that they need to look at it.

Note that this is different from using a stylesheet to set the selected tab
bold - I'd like to set any random tab's text bold.

Been looking at this for several days, appreciate any advice!
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