[gtkmm] unnaming/renaming a widget???

[RevX gmx at]

Hello,

I've loaded a custom style from an rc file and
applied it to a togglebutton via set_name. Now, I 
want to give that button a new style when being
pressed. So I have to "unname" it first, but I
don't know how to do this! Can anyone help me?
(Easier solutions are also welcome :-).)

Thanks in advance!
Michael.

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