def METHOD_NAME(self) -> None:
    if self.config.get('regtest'):
        self.headers = setup_regtest(self)
    else:
        self.headers = Headers.from_file(Net.COIN, self.headers_filename(), Net.CHECKPOINT)
    for n, chain in enumerate(self.headers.chains(), start=1):  # type: ignore
        logger.info(f'chain #{n}: {chain.desc()}')