/guava/guava/src/com/google/common/collect/Maps.java
checkNotNull( map) ;this.fromMap = checkNotNull( fromMap) ;
this.fromMap = checkNotNull ( fromMap ) ;
K extends @Nullable Object, V1 extends @Nullable Object, V2 extends @Nullable Object> extends IteratorBasedAbstractMap<K, V2> { final Map<K, V1> fromMap; final EntryTransformer<? super K, ? super V1, V2> transformer; TransformedEntriesMap( Map<K, V1> fromMap, EntryTransformer<? super K, ? super V1, V2> transformer) { <extra_id_0> this.transformer = checkNotNull(transformer); } @Override public int size() { return fromMap.size(); }