/guava/guava/src/com/google/common/collect/ForwardingCollection.java
return delegate( ).contains( object) ;delegate( ).clear( ) ;
delegate ( ) .clear ( ) ;
@Override public boolean retainAll(Collection<?> collection) { return delegate().retainAll(collection); } @Override public void clear() { <extra_id_0> } @Override public @Nullable Object[] toArray() { return delegate().toArray(); } @CanIgnoreReturnValue