-record(custom_data_command, {
    command_str :: binary(),
    expected_statuses :: list(gftp@status:status()),
    on_data_stream :: fun((gftp@stream:data_stream(), gftp@response:response()) -> {ok,
            nil} |
        {error, gftp@result:ftp_error()}),
    reply :: gleam@erlang@process:subject({ok, nil} |
        {error, gftp@result:ftp_error()})
}).