/**
     * Returns {@code true} if the value has been partially collected, meaning that the value is
     * null.
     */
    static <K, V, E extends InternalEntry<K, V, E>> boolean isCollected(E entry) {
      return entry.getValue() == null;
    }

    /**
     * Gets the value from an entry. Returns {@code null} if the entry is invalid or
     * partially-collected.
     */

		b := NewWriterSize(tw, BufSize)
		b.WriteString("1234")
		tw.check(t, "", "")
		b.WriteString("56789012")   // longer than BufSize
		tw.check(t, "12345678", "") // but not enough (after filling the partially-filled buffer)
		b.Flush()
		tw.check(t, "123456789012", "")
	}
	{
		tw := &teststringwriter{}
		b := NewWriterSize(tw, BufSize)
		b.WriteString("123456789")   // long string, empty buffer:

   *     {@code get()} throws a different kind of exception, that exception itself.
   * @param executor the executor that runs {@code fallback} if {@code input} fails
   * @since 19.0
   */
  @J2ktIncompatible
  @Partially.GwtIncompatible("AVAILABLE but requires exceptionType to be Throwable.class")
  public static <V extends @Nullable Object, X extends Throwable> ListenableFuture<V> catching(
      ListenableFuture<? extends V> input,

    Object key = new Object();
    assertNotNull(cache.getUnchecked(key));

    CacheTesting.simulateValueReclamation(cache, key);

    // this blocks if computation can't deal with partially-collected values
    assertNotNull(cache.getUnchecked(key));
    assertEquals(1, cache.size());
    assertEquals(2, countingLoader.getCount());

    CacheTesting.simulateValueReclamation(cache, key);

				time.Sleep(retryInterval)
				continue
			}
			iamLogIf(ctx, fmt.Errorf("IAM sub-system is partially initialized, unable to write the IAM format: %w", err), logger.WarningKind)
			return
		}

		break
	}

	cache := sys.store.lock()
	setDefaultCannedPolicies(cache.iamPolicyDocsMap)
	sys.store.unlock()

  EXPECT_TF_META("v", -1, TF_ATTR_SHAPE, -1);
  TF_OperationGetAttrShape(oper, "v", nullptr, 10, s_);
  EXPECT_EQ(TF_OK, TF_GetCode(s_)) << TF_Message(s_);

  // Partially specified shape
  const int64_t partial_shape[] = {17, -1};
  const size_t sz = TF_ARRAYSIZE(partial_shape);
  desc = init("shape");
  TF_SetAttrShape(desc, "v", partial_shape, sz);