/guava/android/guava/src/com/google/common/collect/AbstractBiMap.java
return inverse.checkKey( key) ;
return inverse.checkValue ( key ) ;
Inverse(Map<K, V> backward, AbstractBiMap<V, K> forward) { super(backward, forward); } @Override @ParametricNullness K checkKey(@ParametricNullness K key) { <extra_id_0> } @Override @ParametricNullness V checkValue(@ParametricNullness V value) { return inverse.checkKey(value); }