Returns the number of unread messages the user currently has.
Use this method to get the number of unread messages the user
has, then possibly notify them about it with your own UI.
function callback with argument
Notifications count, or -1 in case the SDK has not been initialized.
Enables/disables showing in-app notifications when the user receives a new message.
isEnabled A boolean to set whether notifications are enabled or disabled.
Set whether new in app notification received will play a small sound notification or not (Default is {@code false})
isEnabled A boolean to set whether notifications sound should be played.
@android ONLY