new (ActiveMerchant::Billing::WirecardGateway)

    # File lib/active_merchant/billing/gateways/wirecard.rb, line 47
          def initialize(options = {})
            # verify that username and password are supplied
            requires!(options, :login, :password)
            # unfortunately Wirecard also requires a BusinessCaseSignature in the XML request
            requires!(options, :signature)
            @options = options
            super
          end