attachSuspend
suspend fun <T> Client.InvocationHandle<T>.attachSuspend(options: RequestOptions = RequestOptions.DEFAULT): T
suspend fun <T> Client.IdempotentInvocationHandle<T>.attachSuspend(options: RequestOptions = RequestOptions.DEFAULT): T
suspend fun <T> Client.WorkflowHandle<T>.attachSuspend(options: RequestOptions = RequestOptions.DEFAULT): T