Add a new sub-menu to the GIMP menus.
This function installs a sub-menu which does not belong to any procedure at the location menu_path.
For translations of menu_label to work properly, menu_label should only be marked for translation but passed to
this function untranslated, for example using N_("Submenu"). GIMP will look up the translation in the textdomain registered for the
plug-in.
See also: add_menu_path.
| this |
A PlugIn |
| menu_path |
The sub-menu's menu path. |
| menu_label |
The menu label of the sub-menu. |