I noticed the document here is not up-to-date with actual code.

The document says SDK will use android.provider.Settings.Secure.ANDROID_ID and android.os.Build.SERIAL for Device ID information.
However looks like the actual code use DRM API for Device ID

So ANDROID_ID,SERIAL and DRM API are the same, or document needs to be updated?
I noticed the document here is not up-to-date with actual code.
The document says SDK will use
android.provider.Settings.Secure.ANDROID_IDandandroid.os.Build.SERIALfor Device ID information.However looks like the actual code use
DRM APIfor Device IDSo
ANDROID_ID,SERIALandDRM APIare the same, or document needs to be updated?