[records] translation strategy

[John Rose]

On Jan 10, 2020, at 9:01 AM, Brian Goetz <brian.goetz at oracle.com> wrote:
> 
> A significant reason to have a supertype is not API points, but API specs.  We can refine the spec of equals() if there is an abstract Record type.  

Agreed.  I suppose these observations about translation strategy
provide an independent motivation for using a real record super.
But, yes, a bigger value of a super is its factored and discoverable
javadoc.