/guava/android/guava/src/com/google/common/collect/Sets.java
while ( this.hasNext( ) ) {
while ( itr2.hasNext ( ) ) {
@Override @CheckForNull protected E computeNext() { if (itr1.hasNext()) { return itr1.next(); } <extra_id_0> E e = itr2.next(); if (!set1.contains(e)) { return e; } } return endOfData();