/guava/guava/src/com/google/common/collect/AbstractBiMap.java
return standardContainsAll ( c ) ;
@Override public boolean contains(@CheckForNull Object o) { return Maps.containsEntryImpl(delegate(), o); } @Override public boolean containsAll(Collection<?> c) { <extra_id_0> } @Override public boolean removeAll(Collection<?> c) { return standardRemoveAll(c); } @Override