-record(ftp_client, {
    data_stream :: gftp@stream:data_stream(),
    mode :: gftp@mode:mode(),
    nat_workaround :: boolean(),
    welcome_message :: gleam@option:option(binary()),
    passive_stream_builder :: fun((binary(), integer()) -> {ok,
            gftp@stream:data_stream()} |
        {error, gftp@result:ftp_error()}),
    tls_options :: gleam@option:option(kafein:wrap_options()),
    data_timeout :: integer()
}).