    # File lib/active_merchant/billing/integrations/gestpay/common.rb, line 20
              def parse_response(response)
                case response
                when /#cryptstring#(.*)#\/cryptstring#/, /#decryptstring#(.*)#\/decryptstring#/
                  $1
                when /#error#(.*)#\/error#/
                  raise StandardError, "An error occurred retrieving the encrypted string from GestPay: #{$1}"
                else
                  raise StandardError, "No response was received by GestPay"
                end
              end