insertItem
Inserts @item into @menu.
The "insertion" is actually done by copying all of the attribute and link values of @item and using them to form a new item within @menu. As such, @item itself is not really inserted, but rather, a menu item that is exactly the same as the one presently described by @item.
This means that @item is essentially useless after the insertion occurs. Any changes you make to it are ignored unless it is inserted again (at which point its updated values will be copied).
You should probably just free @item once you're done.
There are many convenience functions to take care of common cases. See g_menu_insert(), g_menu_insert_section() and g_menu_insert_submenu() as well as "prepend" and "append" variants of each of these functions.
Since
2.32
Parameters
the position at which to insert the item
the #GMenuItem to insert