Gtk.TextBuffer.prototype.insert_child_anchor

function insert_child_anchor(iter:Gtk.TextIter, anchor:Gtk.TextChildAnchor):void {
    // Gjs wrapper for gtk_text_buffer_insert_child_anchor()
}

Inserts a child widget anchor into the text buffer at iter. The anchor will be counted as one character in character counts, and when obtaining the buffer contents as a string, will be represented by the Unicode "object replacement character" 0xFFFC. Note that the "slice" variants for obtaining portions of the buffer as a string include this character for child anchors, but the "text" variants do not. E.g. see Gtk.TextBuffer.prototype.get_slice and Gtk.TextBuffer.prototype.get_text. Consider Gtk.TextBuffer.prototype.create_child_anchor as a more convenient alternative to this function. The buffer will add a reference to the anchor, so you can unref it after insertion.