Gtk.TextBuffer.prototype.select_range

function select_range(ins:Gtk.TextIter, bound:Gtk.TextIter):void {
    // Gjs wrapper for gtk_text_buffer_select_range()
}

This function moves the "insert" and "selection_bound" marks simultaneously. If you move them in two steps with Gtk.TextBuffer.prototype.move_mark, you will temporarily select a region in between their old and new locations, which can be pretty inefficient since the temporarily-selected region will force stuff to be recalculated. This function moves them as a unit, which can be optimized.

Since 2.4