Print detailed information on the store.

        .. versionadded:: 0.21.0

def info(self):
        """
        Print detailed information on the store.

        .. versionadded:: 0.21.0
        """
        output = '{type}\nFile path: {path}\n'.format(
            type=type(self), path=pprint_thing(self._path))
        if self.is_open:
            lkeys = sorted(list(self.keys()))
            if len(lkeys):
                keys = []
                values = []

                for k in lkeys:
                    try:
                        s = self.get_storer(k)
                        if s is not None:
                            keys.append(pprint_thing(s.pathname or k))
                            values.append(
                                pprint_thing(s or 'invalid_HDFStore node'))
                    except Exception as detail:
                        keys.append(k)
                        values.append(
                            "[invalid_HDFStore node: {detail}]".format(
                                detail=pprint_thing(detail)))

                output += adjoin(12, keys, values)
            else:
                output += 'Empty'
        else:
            output += "File is CLOSED"

        return output