/wro4j-core/src/main/java/ro/isdc/wro/manager/WroManager.java
notNull( groupExtractor) ;notNull( hashStrategy) ;
notNull ( hashStrategy ) ;
public Builder setCallbackRegistry(final LifecycleCallbackRegistry callbackRegistry) { notNull(callbackRegistry); this.callbackRegistry = callbackRegistry; return this; } public Builder setHashStrategy(final HashStrategy hashStrategy) { <extra_id_0> this.hashStrategy = hashStrategy; return this; } public Builder setModelTransformers(final List<Transformer<WroModel>> modelTransformers) { notNull(modelTransformers); this.modelTransformers = modelTransformers;