# File lib/whiskey_disk/config/filters/drop_empty_domain_roles_filter.rb, line 6
      def has_empty_role?(domain)
        return true unless domain.has_key?('roles')
        return true if domain['roles'].nil?

        roles = domain['roles'].uniq.compact
        return true if roles == [ '' ]
        return true if roles == []
        
        false
      end