SilverStripe\Subsites\Extensions\SiteTreeSubsites::duplicateSubsiteRelations
Duplicate relations using a static property to define which ones we want to duplicate
It may be that some relations are not diostinct to sub site so can stay whereas others may need to be duplicated
Signature
public function duplicateSubsiteRelations(SiteTree
$originalPage )
Parameters
$originalPage
— object