return new SupplierToCacheLoader<>(supplier);
  }

  private static final class FunctionToCacheLoader<K, V> extends CacheLoader<K, V>
      implements Serializable {
    private final Function<K, V> computingFunction;

    FunctionToCacheLoader(Function<K, V> computingFunction) {
      this.computingFunction = checkNotNull(computingFunction);
    }

    @Override

    return new SupplierToCacheLoader<>(supplier);
  }

  private static final class FunctionToCacheLoader<K, V> extends CacheLoader<K, V>
      implements Serializable {
    private final Function<K, V> computingFunction;

    FunctionToCacheLoader(Function<K, V> computingFunction) {
      this.computingFunction = checkNotNull(computingFunction);
    }

    @Override