Check if a directory should be considered in the walk.

def _check_open_dir(self, fs, path, info):
        # type: (FS, Text, Info) -> bool
        """Check if a directory should be considered in the walk.
        """
        if self.exclude_dirs is not None and fs.match(self.exclude_dirs, info.name):
            return False
        if self.filter_dirs is not None and not fs.match(self.filter_dirs, info.name):
            return False
        return self.check_open_dir(fs, path, info)