switch (XObject.type(this.items[0].xtype)) {
case "GtkCellRendererText":
this.el.add_attribute(this.items[0].el , 'markup', col );
break;
case "GtkCellRendererToggle":
print("toggle col : " + col);
switch (XObject.type(this.items[0].xtype)) {
case "GtkCellRendererText":
this.el.add_attribute(this.items[0].el , 'markup', col );
break;
case "GtkCellRendererToggle":
print("toggle col : " + col);