Two comments on the Constants API

[Brian Goetz]

As you can see from the comment on ConstantDesc, there's a note that 
says "these types will be sealed some day, subclass at your own risk."

On 6/4/2018 6:43 PM, jbvernee wrote:
>
> So I'm not sure how much adding another interface would actually help. 
> I might be biased though, since I use the auto-complete feature a lot 
> to 'explore'. (if you do add it though, please make it package-access 
> in java.lang, to avoid people trying to implement it themselves).