Gtk.Editable.prototype.get_chars

function get_chars(start_pos:Number, end_pos:Number):String {
    // Gjs wrapper for gtk_editable_get_chars()
}

Retrieves a sequence of characters. The characters that are retrieved are those characters at positions from start_pos up to, but not including end_pos. If end_pos is negative, then the characters retrieved are those characters from start_pos to the end of the text.

Note that positions are specified in characters, not bytes.