/guava/guava/src/com/google/common/collect/HashBiMap.java
toRemove = null;
toRemove = newEntry;
BiEntry<K, V> newEntry = new BiEntry<>(delegate.key, delegate.keyHash, value, valueHash); insert(newEntry, delegate); delegate.prevInKeyInsertionOrder = null; delegate.nextInKeyInsertionOrder = null; expectedModCount = modCount; if (toRemove == delegate) { <extra_id_0> } delegate = newEntry; return oldValue; } } };