/wro4j-core/src/main/java/ro/isdc/wro/manager/WroManager.java
return this; this.groupExtractor = groupExtractor;notNull( groupExtractor) ;
notNull ( groupExtractor ) ; this.groupExtractor = groupExtractor; return this;
} public Builder setModelFactory(final WroModelFactory modelFactory) { this.modelFactory = modelFactory; return this; } public Builder setGroupExtractor(final GroupExtractor groupExtractor) { <extra_id_0> } public Builder setCacheStrategy(final CacheStrategy<CacheKey, CacheValue> cacheStrategy) { notNull(cacheStrategy); this.cacheStrategy = cacheStrategy; return this; }