# File lib/stella/utils.rb, line 102
    def domain(host)
      begin
        PublicSuffixService.parse host
      rescue PublicSuffixService::DomainInvalid => ex
        Stella.ld ex.message
        nil
      rescue => ex
        Stella.li "Error determining domain for #{host}: #{ex.message} (#{ex.class})"
        Stella.ld ex.backtrace
        nil
      end
    end