Faker\UniqueGenerator::__call PHP Method

    public function __call($name, $arguments)
    {
        if (!isset($this->uniques[$name])) {
            $this->uniques[$name] = array();
        }
        $i = 0;
        do {
            $res = call_user_func_array(array($this->generator, $name), $arguments);
            $i++;
            if ($i > $this->maxRetries) {
                throw new \OverflowException(sprintf('Maximum retries of %d reached without finding a unique value', $this->maxRetries));
            }
        } while (array_key_exists(serialize($res), $this->uniques[$name]));
        $this->uniques[$name][serialize($res)] = null;
        return $res;
    }