virtual std::vector<string> ListFunctionNames() = 0;

  struct CacheStats {
    int64_t kernel_cache_size;
    int64_t device_cache_size;
    std::map<std::string, int64_t> func_kernel_cache_entries;
    int64_t local_rendezvous_cache_active_size;
  };
  virtual CacheStats GetCacheStats() = 0;

  //===--------------------------------------------------------------------===//

 * configured and created using {@link CacheBuilder}, with cache entries being loaded by {@link
 * CacheLoader}. Statistics about cache performance are exposed using {@link CacheStats}.
 *
 * <p>See the Guava User Guide article on <a
 * href="https://github.com/google/guava/wiki/CachesExplained">caches</a>.
 *

   * created using {@link CacheBuilder} only does so if the {@link CacheBuilder#recordStats} method
   * was called. If statistics are not being recorded, a {@code CacheStats} instance with zero for
   * all values is returned.
   *
   */
  CacheStats stats();

  /**
   * Returns a view of the entries stored in this cache as a thread-safe map. Modifications made to
   * the map directly affect the cache.
   *

  }

  @Override
  public void invalidateAll() {
    delegate().invalidateAll();
  }

  @Override
  public long size() {
    return delegate().size();
  }

  @Override
  public CacheStats stats() {
    return delegate().stats();
  }

  @Override
  @J2ktIncompatible
  public ConcurrentMap<K, V> asMap() {
    return delegate().asMap();
  }

  @Override

            @Override
            public void recordEviction() {}

            @Override
            public CacheStats snapshot() {
              return EMPTY_STATS;
            }
          });
  static final CacheStats EMPTY_STATS = new CacheStats(0, 0, 0, 0, 0, 0);

  /*
   * We avoid using a method reference or lambda here for now:
   *

    LocalLoadingCache<Object, Object> cache = makeCache(builder, identityLoader());
    assertThat(cache.stats()).isEqualTo(EMPTY_STATS);

    Object one = new Object();
    cache.getUnchecked(one);
    CacheStats stats = cache.stats();
    assertThat(stats.requestCount()).isEqualTo(1);
    assertThat(stats.hitCount()).isEqualTo(0);
    assertThat(stats.hitRate()).isEqualTo(0.0);
    assertThat(stats.missCount()).isEqualTo(1);

    LocalLoadingCache<Object, Object> cache = makeCache(builder, identityLoader());
    assertThat(cache.stats()).isEqualTo(EMPTY_STATS);

    Object one = new Object();
    cache.getUnchecked(one);
    CacheStats stats = cache.stats();
    assertThat(stats.requestCount()).isEqualTo(1);
    assertThat(stats.hitCount()).isEqualTo(0);
    assertThat(stats.hitRate()).isEqualTo(0.0);
    assertThat(stats.missCount()).isEqualTo(1);

            @Override
            public void recordEviction() {}

            @Override
            public CacheStats snapshot() {
              return EMPTY_STATS;
            }
          });
  static final CacheStats EMPTY_STATS = new CacheStats(0, 0, 0, 0, 0, 0);

  /*
   * We avoid using a method reference or lambda here for now:
   *

      assertWithMessage("Invalid removal notification")
          .that(notification.getValue())
          .isEqualTo(notification.getKey());
    }

    CacheStats stats = cache.stats();
    assertThat(stats.evictionCount()).isEqualTo(removalListener.size());
    assertThat(stats.loadSuccessCount()).isEqualTo(computeCount.get());

      assertWithMessage("Invalid removal notification")
          .that(notification.getValue())
          .isEqualTo(notification.getKey());
    }

    CacheStats stats = cache.stats();
    assertThat(stats.evictionCount()).isEqualTo(removalListener.size());
    assertThat(stats.loadSuccessCount()).isEqualTo(computeCount.get());