Properties
constructor(contentType: String? = null, contentEncoding: String? = null, headers: Table? = null, deliveryMode: UByte? = null, priority: UByte? = null, correlationId: String? = null, replyTo: String? = null, expiration: String? = null, messageId: String? = null, timestamp: Long? = null, type: String? = null, userId: String? = null, appId: String? = null, reserved1: String? = null)