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

Calculating dependencies ... done!
Dependency resolution took 1.02 s (backtrack: 0/20).

[ebuild  N     ] dev-cpp/azure-core-1.16.3:0/1.16.3::gentoo  USE="-doc" 3373 KiB
[ebuild  N     ] dev-cpp/azure-security-keyvault-certificates-4.2.1:0/4.2.1::gentoo  USE="-doc" 2897 KiB

Total: 2 packages (2 new), Size of downloads: 6269 KiB