Is there a way to show an event's description when I click on it ?

[Oumaima-abm]

I want to show the whole event's details that are in the BaseCalendarEvent in an Alert Dialog when i click on a particular event but when I try to implement the onEventSelected, it only uses a CalendarEvent variable so I cannot access the even'ts description
Here is the code

override fun onEventSelected(event: CalendarEvent?) {
        Toast.makeText(getApplicationContext(),"EVENT SELECTED",Toast.LENGTH_SHORT);
        val alertDialog = AlertDialog.Builder(this)
            //set icon
            .setIcon(android.R.drawable.ic_menu_agenda)
            //set title
            .setTitle(event!!.title)
            //set message
            .setMessage("event.description")
            //set positive button
            .setPositiveButton("Okay", DialogInterface.OnClickListener { dialog, i ->
                //set what would happen when positive button is clicked
                finish()
            })
            .show()
    }

Is there a way to get the event's description?
Your help would be much appreciated