code: func TreeViewColumnNew() (*TreeViewColumn, error) {
  	c := C.gtk_tree_view_column_new()
  	if c == nil {
  		return nil, nilPtrErr
  	}
  	return wrapTreeViewColumn(glib.Take(unsafe.Pointer(c))), nil
  }
docs: // TreeViewColumnNew() is a wrapper around gtk_tree_view_column_new().