column->add_attribute(cellrenderer_time_track->property_canvas(), param_model.canvas);
column->add_attribute(cellrenderer_time_track->property_visible(), param_model.is_value_node);
column->add_attribute(cellrenderer_time_track->property_canvas(), param_model.canvas);
column->add_attribute(cellrenderer_time_track->property_visible(), param_model.is_value_node);