src/Ubiquity/utils/http/USession.php
public static function dec($key, $dec = 1) {
		return self::set ( $key, self::get ( $key, 0 ) - $dec );
	}
public static function dec($key, $dec = 1) {
		return self::set ( $key, self::get ( $key, 0 ) - $dec );
	}
public static function dec ( $ key , $ dec = 1 ) { return self :: set ( $ key , self :: get ( $ key , 0 ) - $ dec ) ; }
Decrement the value at the key index in session

@param string $key
@param number $dec
@return number
Decrement the value at the key index in session