Get sms session info.
Delete sms messages.
array of message ids to delete.
Delete session.
Get sms messages.
Load more messages before given message.
OptionalfromMessage: SmsMessage
message from which timestamp messages should be loaded.
Mark all messages before given timestamp as seen.
timestamp of the last message that wants to be marked as seen.
Send sms message.
message text.
Optionalfiles: FssFile[]
message files for MMS.
Sync messages.
timestamp of when the last sync of messages happened
Get event emitter. All SmsEvents related to session will be posted on this emmiter.