GLib.IOChannel.prototype.set_line_term

function set_line_term(line_term: String, length: Number(gint)): void {
    // Gjs wrapper for g_io_channel_set_line_term()
}

This sets the string that GLib.IOChannel uses to determine where in the file a line break occurs.

line_term: The line termination string. Use null for autodetect. Autodetection breaks on "\n", "\r\n", "\r", "\0", and the Unicode paragraph separator. Autodetection should not be used for anything other than file-based channels.
length: The length of the termination string. If -1 is passed, the string is assumed to be nul-terminated. This option allows termination strings with embedded nuls.