This event is triggered when a media message is received.
This event is triggered when a message is deleted.
This event is triggered when a message is edited.
This event is triggered when a message is delivered.
This event is triggered when a message is read.
This event is triggered when a text message is received.
This event is triggered when a transient message is received.
This event is triggered when someone stops typing.
This event is triggered when someone start typing.
This event is triggered when a custom message is received.