@SuppressWarnings("hiding") used in SimpleTrafficLightsComponentArchitectureExample
The field INSTANCE is already declared in an interface which
SimpleTrafficLightsComponentArchitectureExample implements,
and @SuppressWarnings(“hiding”), which is not allowed, is used to
suppress the corresponding warning at this moment.
In order to remove it, one can think about defining a getter to replace
the field INSTANCE.
Since this change is time-consuming, we manage it after the release of
AF3 2.8.
(from redmine: issue id 2416, created on 2015-08-19, closed on 2016-07-05)