RFR(m): 8177290 add copy factory methods for unmodifiable List, Set, Map

[Brian Goetz]

Use-site static extension methods = bad.  

Sent from my MacBook Wheel

> On Nov 18, 2017, at 11:12 AM, John Rose <john.r.rose at oracle.com> wrote:
> 
>> On Nov 18, 2017, at 11:10 AM, Brian Goetz <brian.goetz at oracle.com> wrote:
>> 
>> I'm with Remi on this.  
> 
> Which suggestion of his two?  Blue-collar language with bad DSLs,
> or final defaults?
> 
> — John