if ( function_exists( 'notification' ) ) :
'hash' => 'my_programmatic_notification', // Unique notification hash, automatically generated.
'title' => 'My programmatic notification',
'trigger' => 'trigger_slug',
'subject' => 'Email from ghost notification!',
'body' => 'This is nice, {user_first_name}, huh?',
'type' => 'administrator',
'recipient' => '{user_email}',
'extras' => [], // Extra data array, ie. config for add-ons.
'version' => time(), // Version of the notification, should be a timestamp. Default: current time.