Gush\Config::has PHP Method

Note. A value with null is considered undefined.

public has ( string $key, string $type = self::CONFIG_ALL ) : boolean
$key	string	Single level key like "adapters" or property-path "[adapters][github]"
$type	string	Either Config::CONFIG_SYSTEM Config::CONFIG_LOCAL or Config::CONFIG_ALL
return	boolean

    public function has($key, $type = self::CONFIG_ALL)
    {
        return null !== $this->get($key, $type);
    }

Config