Parenthesized Pattern

Change-Id: I881657034b9b721426524b6a406d45f160ad0797
Signed-off-by: Jay Arthanareeswaran <jarthana@in.ibm.com>
Reviewed-on: https://git.eclipse.org/r/c/jdt/eclipse.jdt.core/+/184223
Tested-by: Sarika Sinha <sarika.sinha@in.ibm.com>
Tested-by: JDT Bot <jdt-bot@eclipse.org>
Reviewed-by: Sarika Sinha <sarika.sinha@in.ibm.com>