Ferno\Loco\Pattern::__construct PHP Method

    public function __construct($concs)
    {
        foreach ($concs as $conc) {
            if (!is_a($conc, "Conc")) {
                throw new Exception("Not a Conc: " . var_export($conc, true));
            }
        }
        $this->concs = $concs;
    }