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