/guava/android/guava/src/com/google/common/collect/Sets.java
return set1.contains( object) || set2.contains( object) ;
return set1.contains ( object ) && set2.contains ( object ) ;
@Override public boolean isEmpty() { return Collections.disjoint(set2, set1); } @Override public boolean contains(@CheckForNull Object object) { <extra_id_0> } @Override public boolean containsAll(Collection<?> collection) { return set1.containsAll(collection) && set2.containsAll(collection); } };