public static function lineOut($s, $color = null, $appendNewline = true, $echo = true) {
        if ($color) {
            self::addStringColoring($s, $color);
        }
        $out = "{$s}" . ($appendNewline ? "\n" : '');
        if ($echo && !static::$_quiet) {
            print $out;
        } else {
            return $out;
        }
    }