how to check if we are in Acrobat Pro DC or Acrobat Reader DC from java script.

I have written "User"  Specific Folder level script. I placed it in 

"~/Library/Application Support/Adobe/Acrobat/DC/JavaScripts"

It is getting loaded both in  Acrobat Pro DC and Acrobat Reader DC . How can i differentiate both from inside JavaScript.

I tried checking plugin names by using 

app.plugIns.toString()

Is there any other efficient way to do this .