How to get a split apk from a device via adb?

There is a well-known question on how to get APKs from an Android device with adb.

However, this fails for split APKs, because there, adb shell pm path com.example.someapp does list you not only one path, but many as shown in this example:

adb shell pm path com.example.someapp

package:/data/app/com.example.someapp-5Vnt5z8Kiyfka4DG7cFr3Q==/base.apk

package:/data/app/com.example.someapp-5Vnt5z8Kiyfka4DG7cFr3Q==/split_config.en.apk

package:/data/app/com.example.someapp-5Vnt5z8Kiyfka4DG7cFr3Q==/split_config.x86.apk

package:/data/app/com.example.someapp-5Vnt5z8Kiyfka4DG7cFr3Q==/split_config.xxhdpi.apk

So how to do that?
Do you need to pull all? Or is base.apk (the filename you always get for non-split-apks) e.g. enough?
And how to reinstall them then later?