code: func (v *Notebook) InsertPage(child IWidget, tabLabel IWidget, position int) int {
  	label := nullableWidget(tabLabel)
  	c := C.gtk_notebook_insert_page(v.native(), child.toWidget(), label, C.gint(position))
  
  	return int(c)
  }
docs: // InsertPage() is a wrapper around gtk_notebook_insert_page().