RFR CODETOOLS-7902202: [macosx]Jemmy JInternalFrameOperator: APIs maximize(), demaximize() and iconify() are failing with NullPointerException in Mac OSx

[Alexandre (Shura) Iline]

This looks good, Muneer!

> On Aug 3, 2018, at 8:08 AM, Muneer Kolarkunnu <abdul.kolarkunnu at oracle.com> wrote:
> 
> Hi All,
> 
> Please review fix for the bug: https://bugs.openjdk.java.net/browse/CODETOOLS-7902202
> Webrev : http://cr.openjdk.java.net/~akolarkunnu/7902202/webrev.00/
> 
> Regards,
> Muneer