Missing CodeLens references count in Visual Studio Community edition 2015 and 2017

Question

1. Is there a reason why the references count (code lens) is missing in Visual Studio Community edition?
2. Is is possible to enable it in the options?

Answer 1

I have Visual Studio 2015 Community edition and it originally did NOT have CodeLens.

However, after going to Tools -> Extensions and Updates -> Product Updates and then downloading SSDT and installing all options within the SSDT package, my VS 2015 Community Edition now miraculously has access to CodeLens.