bug#58282: Distinguishing glasses-mode display

[Eli Zaretskii <eliz@gnu.org>]

> Date: Thu, 06 Oct 2022 00:56:05 +0000
> From: uzibalqa <uzibalqa@proton.me>
> Cc: dimech@gmx.com, 58282@debbugs.gnu.org
> 
> > Here's the defcustom of that option from glasses.el:
> > 
> > (defcustom glasses-separator "_"
> > "String to be displayed as a visual separator in identifiers.
> > It is used both for adding missing separators and for replacing separators
> > defined by `glasses-original-separator'. If you don't want to add missing separators, set` glasses-separator' to an empty string. If you don't want to
> > replace existent separators, set `glasses-original-separator' to an empty
> > string."
> > :type 'string
> > :set 'glasses-custom-set
> > :initialize 'custom-initialize-default)
> > 
> > What does the :set attribute tell you?
> 
> I could call (glasses-set-overlay-properties)

That's not really related.

What the :set attribute says is that you need to call that function
after changing the value, to "install" the new value.