/guava/guava/src/com/google/common/util/concurrent/AtomicLongMap.java
private ConcurrentHashMap<K, Long> map;
private final ConcurrentHashMap<K, Long> map;
import java.util.function.LongUnaryOperator; import javax.annotation.CheckForNull; @GwtCompatible @J2ktIncompatible @ElementTypesAreNonnullByDefault public final class AtomicLongMap<K> implements Serializable { <extra_id_0> private AtomicLongMap(ConcurrentHashMap<K, Long> map) { this.map = checkNotNull(map); } public static <K> AtomicLongMap<K> create() { return new AtomicLongMap<K>(new ConcurrentHashMap<>()); }