code: func (v *TreeView) GetSearchEntry() *Entry {
  	c := C.gtk_tree_view_get_search_entry(v.native())
  	if c == nil {
  		return nil
  	}
  	return wrapEntry(glib.Take(unsafe.Pointer(c)))
  }
docs: // GetSearchEntry is a wrapper around gtk_tree_view_get_search_entry().