registerTransformers method
Registered transformers will run when a source event is hit.
Implementation
EventBus registerTransformers(List<EventTransformer> transformers) {
for (final transformer in transformers) {
final key = transformer.key;
_transformers.containsKey(key)
? _transformers[key]!.add(transformer)
: _transformers[key] = [transformer];
}
return this;
}