waitUntilPortalNotExists
suspend fun IotSiteWiseClient.waitUntilPortalNotExists(request: DescribePortalRequest, retryStrategy: RetryStrategy? = null): Outcome<DescribePortalResponse>
suspend fun IotSiteWiseClient.waitUntilPortalNotExists(block: DescribePortalRequest.Builder.() -> Unit): Outcome<DescribePortalResponse>