<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_subdomain_last_sequence(db_path=None, zonefiles_dir=None):
 """ Static method for getting the last sequence number in the database """

    opts = get_blockstack_opts()
    if not is_subdomains_enabled(opts):
        return []

    if db_path is None:
        db_path = opts['subdomaindb_path']

    if zonefiles_dir is None:
        zonefiles_dir = opts['zonefiles']

    db = SubdomainDB(db_path, zonefiles_dir)
    return db.get_last_sequence()