waitUntilAppExists
suspend fun OpsWorksClient.waitUntilAppExists(request: DescribeAppsRequest = DescribeAppsRequest { }, retryStrategy: RetryStrategy? = null): Outcome<DescribeAppsResponse>
suspend fun OpsWorksClient.waitUntilAppExists(block: DescribeAppsRequest.Builder.() -> Unit): Outcome<DescribeAppsResponse>