Gtk.TextIter.prototype.forward_char

function forward_char():Boolean {
    // Gjs wrapper for gtk_text_iter_forward_char()
}

Moves iter forward by one character offset. Note that images embedded in the buffer occupy 1 character slot, so gtk_text_iter_forward_char () may actually move onto an image instead of a character, if you have images in your buffer. If iter is the end iterator or one character before it, iter will now point at the end iterator, and gtk_text_iter_forward_char () returns false for convenience when writing loops.