/**
     * Check if a directory is writable.
     *
     * if (Filesystem::isDirWritable('folder1')) {
     *     // Do something...
     * }
     *
     * @param  string $path The path to check.
     * @return bool
     */
    public static function isDirWritable(string $path) : bool
    {
        // Create temporary file
        $file = tempnam($path, 'writable');
        // File has been created
        if ($file !== false) {
            // Remove temporary file
            Filesystem::deleteFile($file);
            //  Writable
            return true;
        }
        // Else not writable
        return false;
    }