These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.00 s (backtrack: 0/20).

[ebuild  N     ] gnome-base/gnome-menus-3.38.1:3::gentoo  USE="-introspection -test" 461 KiB

Total: 1 package (1 new), Size of downloads: 461 KiB