$duration : int
$billedDuration : int
$billedAmount : float
$attempts : int
$actions : int
getDuration()
setDuration( $duration)
getBilledDuration()
setBilledDuration( $billedDuration)
getBilledAmount()
setBilledAmount( $billedAmount)
getAttempts()
setAttempts( $attempts)
getActions()
setActions( $actions)
ns()