def METHOD_NAME(self, request, queryset):
    for page in queryset:
        locked_signs = page.locked_signs.all()
        if not locked_signs:
            self.message_user(request, f"No Signs are locked to {page.name}.", level="ERROR")
        else:
            page.locked_signs.clear()
            self.message_user(request, f"Successfully unlocked {join_nicely(locked_signs)} from {page.name}.")