PUSH_URL
$airship :
$audience :
$notification :
$options :
$deviceTypes :
$message :
$inAppMessage :
__construct( $airship)
setAudience( $audience)
setNotification( $notification)
setDeviceTypes( $deviceTypes)
setMessage( $message)
setInAppMessage( $inAppMessage)
setOptions( $options)
getPayload()
send()