protected final EnumSet<C.Feature> features_() { if (null == features_) { synchronized (this) { if (null == features_) { features_ = initFeatures(); assert(null != features_); } } } return features_; }
protected final EnumSet<C.Feature> features_() { if (null == features_) { synchronized (this) { if (null == features_) { features_ = initFeatures(); assert(null != features_); } } } return features_; }