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

Calculating dependencies ... done!
Dependency resolution took 0.97 s (backtrack: 0/20).

[ebuild  N     ] app-emulation/virtualbox-additions-7.2.16:0/7.2::gentoo  51854 KiB

Total: 1 package (1 new), Size of downloads: 51854 KiB