onSend
open fun onSend(context: <Error class: unknown class>?, remoteConversationId: String, remoteSelfUserId: String, remoteClientIdSelf: String, targetRecipientsJson: String?, clientIdDestination: String?, data: <Error class: unknown class>?, length: <Error class: unknown class>, isTransient: Boolean, myClientsOnly: Boolean, arg: <Error class: unknown class>?): Int