def match(self, fpath):
        """Does `fpath` indicate a file in one of our trees?"""
        for d in self.dirs:
            if fpath.startswith(d):
                if fpath == d:
                    # This is the same file!
                    return True
                if fpath[len(d)] == os.sep:
                    # This is a file in the directory
                    return True
        return False