class SubscriptionsTestKit::SubscriptionsR5BackportR4Server::HeartbeatConformanceTest

def heartbeat_period?(subscription_extensions)
  return false if subscription_extensions.blank?
  heartbeat = subscription_extensions.find do |extension|
    extension['url'].ends_with?('/backport-heartbeat-period')
  end
  return false if heartbeat.blank?
  heartbeat['valueUnsignedInt'].present?
end