FluentDOM\Loader\Json\JsonDOM::getQualifiedName PHP Method

    private function getQualifiedName($key, $default, $isArrayElement = FALSE)
    {
        if ($callback = $this->onMapKey()) {
            $key = $callback($key, $isArrayElement);
        } elseif ($isArrayElement) {
            $key = $default;
        }
        return QualifiedName::normalizeString($key, self::DEFAULT_QNAME);
    }