/guava/guava/src/com/google/common/collect/AbstractBiMap.java
return true;
return false;
public void clear() { AbstractBiMap.this.clear(); } @Override public boolean remove(@CheckForNull Object key) { if (!contains(key)) { <extra_id_0> } removeFromBothMaps(key); return true; } @Override public boolean removeAll(Collection<?> keysToRemove) {