OS.gtk_tree_view_column_set_visible (handle, true);
public void pack () {	checkWidget();	/*	* Feature in GTK.  Calling gtk_tree_view_column_set_sizing() with 	* GTK_TREE_VIEW_COLUMN_AUTOSIZE causes the tree view	* column to be not resizable.  The fix is to reset this afterawards.	*/ 	boolean resizable = OS.gtk_tree_view_column_get_resizable (handle);	OS.gtk_tree_view_column_set_sizing (handle, OS.GTK_TREE_VIEW_COLUMN_AUTOSIZE);	OS.gtk_tree_view_column_set_resizable (handle, resizable);}