[Papyrus] How to print the name of the animation currently playing?

[Nexussux!]

Whenever Sexlab starts an animation, it will display a message, i.e "Playing Animation: Leito Missionary 3"

 

However, when trying to recreate this in my own script, there is no output.

 

string msg = "CUSTOM Playing Animation: " + Animation.Name
SexLabUtil.PrintConsole(msg)
Debug.Notification(msg)

 

Neither SexlabUtil nor Debug print the animation name. The output looks like "CUSTOM Playing Animation:                  "

What is the reason? How to make the animation name show up?