Unfortunately, Rebex HTTPS only supports session resumption with ID/caching (RFC 5246). Session resumption with tickets (RFC 5077) is not supported.
Rebex HTTPS currently offers no API to determine whether HTTPS connection's underlying TLS session has been reused/resumed, but it can be determined from a communication log ("Trying to resume session" log message indicates session resumption attempt, "Resuming session" indicates actual resumption).