This event is signalled by AbstractMenu::getItems() (and it's children) in inc/Menu/AbstractMenu.php when when the menu in question is assembled, handlers can use it to add or remove items from the menu.

The $data array contains two keys:

• view defines the menu that is currently built (please refer to Menus on which menus exist)
• items contains an array of AbtractItem descendants.

An example on how to implement this event can be seen in this merge request.

The following plugins are known to handle this event and their source code may be a good start for understanding and implementing a handler yourself.

• Action Plugins
• Events
• Menus