public function shouldEnableLegacyNamespace()
    {
        if (isset($this->pkgAutoloaderMapCoreExtensions) && $this->pkgAutoloaderMapCoreExtensions) {
            // We're no longer using this to denote non-legacy applications, but if a package uses this
            // that means it's NOT using the legacy namespace.
            return false;
        }

        $concrete5 = '7.9.9';
        $package = $this->getApplicationVersionRequired();
        if (version_compare($package, $concrete5, '>')) {
            return false;
        }

        return $this->pkgEnableLegacyNamespace;
    }