RFR 8148609: supportedOptions() methods return a mutable set

[Chris Hegarty]

> On 2 Mar 2016, at 08:19, Alan Bateman <Alan.Bateman at oracle.com> wrote:
> 
> 
> 
> On 02/03/2016 06:47, vyom wrote:
>> Hi Chris/Alan,
>> 
>> Thanks for review, please find the updated webrev(http://cr.openjdk.java.net/~nkumar/vyom/8148609/webrev0.1/index.html <http://cr.openjdk.java.net/%7Enkumar/vyom/8148609/webrev0.1/index.html>). 
> This looks much better.

+1

> I see the test is named SupportedOptionTest and so hints that it tests more than it does. I wonder if we could find a better name for it, maybe ImmutableOptions or something along those lines.

ImmutableOptions is better.

-Chris.