Best way to handle config overrides in packages

[Олег Михайлов]

I have a case when I need to add multiple configuration files for another
package into the system as parts of its split config. The thing is, I need
to remove them when I remove my package because they include lines which
are only valid when the package is installed.
Is there any nice way to go about this using dh or anything in the debian
folder of the package?
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Best Regards,
        Oleg