def subscriptions
      xml do |xml|
        xml.css("preApprovalSearchResult > preApprovals > preApproval").map do |node|
          Subscription.load_from_xml(node)
        end
      end
    end
def subscriptions
      xml do |xml|
        xml.css("preApprovalSearchResult > preApprovals > preApproval").map do |node|
          Subscription.load_from_xml(node)
        end
      end
    end
Return the list of subscriptions.
 Each item will be wrapped in a PagSeguro::Subscription instance.
 Notice that subscriptions instantiated by the report won't have all attributes.
 If you need additional attributes, do a PagSeguro::Subscription.find_by_code
 call. Remember that this will perform an additional HTTP request.