Creates a new #GtkRadioToolButton adding it to the same group as group. The new #GtkRadioToolButton will contain an icon and label from the stock item indicated by stock_id.
An existing #GtkRadioToolButton.
the name of a stock item
A new #GtkRadioToolButton
Deprecated: gtk_radio_tool_button_new_from_widget
Creates a new #GtkRadioToolButton adding it to the same group as group. The new #GtkRadioToolButton will contain an icon and label from the stock item indicated by stock_id.