    # File lib/active_merchant/billing/integrations/return.rb, line 20
            def parse(query_string)
              return {} if query_string.blank?

              query_string.split('&').inject({}) do |memo, chunk|
                next if chunk.empty?
                key, value = chunk.split('=', 2)
                next if key.empty?
                value = value.nil? ? nil : CGI.unescape(value)
                memo[CGI.unescape(key)] = value
                memo
              end
            end