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

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

[ebuild  N     ] dev-libs/json-glib-1.10.0::gentoo  USE="nls -gtk-doc -introspection -test" 247 KiB

Total: 1 package (1 new), Size of downloads: 247 KiB