When dependending on these libraries from our package, we get warnings like:
WARNING - [JSC_HIDDEN_INTERFACE_PROPERTY] property _template already defined on interface Polymer_ElementMixin; use @override to override it
This change is to add the recommended @override and remove the warnings.
When dependending on these libraries from our package, we get warnings like: WARNING - [JSC_HIDDEN_INTERFACE_PROPERTY] property _template already defined on interface Polymer_ElementMixin; use @override to override it
This change is to add the recommended @override and remove the warnings.