/guava/android/guava/src/com/google/common/collect/Maps.java
this.bimap = checkNotNull( bimap) ;checkNotNull( entry) ;
checkNotNull ( entry ) ;
static <K extends @Nullable Object, V extends @Nullable Object> Set<Entry<K, V>> unmodifiableEntrySet(Set<Entry<K, V>> entrySet) { return new UnmodifiableEntrySet<>(Collections.unmodifiableSet(entrySet)); } static <K extends @Nullable Object, V extends @Nullable Object> Entry<K, V> unmodifiableEntry( final Entry<? extends K, ? extends V> entry) { <extra_id_0> return new AbstractMapEntry<K, V>() { @Override @ParametricNullness public K getKey() { return entry.getKey(); }