//Gtk::CellRendererPixbuf* icon_cellrenderer = Gtk::manage( new Gtk::CellRendererPixbuf() );
//column->pack_start(*icon_cellrenderer,false);
//column->add_attribute(icon_cellrenderer->property_pixbuf(), layer_model.icon);
//Gtk::CellRendererPixbuf* icon_cellrenderer = Gtk::manage( new Gtk::CellRendererPixbuf() );
//column->pack_start(*icon_cellrenderer,false);
//column->add_attribute(icon_cellrenderer->property_pixbuf(), layer_model.icon);