def virtual_table_using(self) -> Optional[str]:
        "Type of virtual table, or ``None`` if this is not a virtual table."
        match = _virtual_table_using_re.match(self.schema)
        if match is None:
            return None
        return match.groupdict()["using"].upper()
Type of virtual table, or ``None`` if this is not a virtual table.
sqlite_utils/db.py