registerMouseArea method
Register the given ShadMouseAreaRenderBox with the registry.
Implementation
@override
void registerMouseArea(ShadMouseAreaRenderBox region) {
assert(!_registeredRegions.contains(region));
_registeredRegions.add(region);
if (region.groupId != null) {
_groupIdToRegions[region.groupId] ??= <ShadMouseAreaRenderBox>{};
_groupIdToRegions[region.groupId]!.add(region);
}
}