a pillar question (along with PRHTMLWriter)

Hi,

I have this in stable pillar installation:

PRHTMLWriter >>visitInternalLink: anInternalLink
        | href |
        href := String new.
        self configuration separateOutputFiles
                ifTrue: [
                        anInternalLink hasReference
                                ifTrue: [ href := href , anInternalLink referenceAsHTML ] ]
                ifFalse: [ self internalLinkWillBeRender: anInternalLink ].
        …
        etc.

now, turns out that:

        self configuration separateOutputFiles

pillar configuration DNU separateOutputFiles :(

since I’m not a pillar dev, I don’t know the rational behind the removal of that method so I don’t know how to replace it.
what’s the correct way of fix that?
any idea?

Esteban