def fault
      @fault ||= begin
        node = doc.at_xpath('/soap:Envelope/soap:Body/soap:Fault', 'soap' => soap_namespace)
        Fault.new(request, node) if node
      end
    end
def fault
      @fault ||= begin
        node = doc.at_xpath('/soap:Envelope/soap:Body/soap:Fault', 'soap' => soap_namespace)
        Fault.new(request, node) if node
      end
    end
SOAP fault, if any