src/bitExpert/Pathfinder/Matcher/ConstantSetMatcher.php
protected function transformPatternToRegEx(string $pattern) : string
    {
        $pattern = str_replace('*', '.*', $pattern);
        $pattern = str_replace('?', '.', $pattern);
        return '/^' . $pattern . '$/';
    }
protected function transformPatternToRegEx(string $pattern) : string
    {
        $pattern = str_replace('*', '.*', $pattern);
        $pattern = str_replace('?', '.', $pattern);
        return '/^' . $pattern . '$/';
    }
Transforms a simplified pattern (* for multiple characters ? for one)
to a regular expression.

@param string $pattern
@return string