fastIterator
inline fun <K, V> Object2ObjectMap<K, V>.fastIterator(): ObjectIterator<Object2ObjectMap.Entry<K, V>>
inline fun <K, V> Object2ReferenceMap<K, V>.fastIterator(): ObjectIterator<Object2ReferenceMap.Entry<K, V>>
inline fun <K> Reference2BooleanMap<K>.fastIterator(): ObjectIterator<Reference2BooleanMap.Entry<K>>