```java
// In SmbFile.java
private DirectoryLeaseManager directoryLeaseManager;
private Smb2LeaseKey directoryLeaseKey;

@Override
public SmbFile[] listFiles() throws IOException {
    if (!isDirectory()) {
        throw new IOException("Not a directory");
    }
    
    // Check if we can use cached directory listing
    if (directoryLeaseManager != null && 

 * will change the table.
 *
 * <p>All methods that modify the table are optional, and the views returned by the table may or may
 * not be modifiable. When modification isn't supported, those methods will throw an {@link
 * UnsupportedOperationException}.
 *
 * <h3>Implementations</h3>
 *
 * <ul>
 *   <li>{@link ImmutableTable}
 *   <li>{@link HashBasedTable}
 *   <li>{@link TreeBasedTable}
 *   <li>{@link ArrayTable}

    @CanIgnoreReturnValue
    @Override
    @ParametricNullness
    public final V get() throws InterruptedException, ExecutionException {
      return super.get();
    }

    @CanIgnoreReturnValue
    @Override
    @ParametricNullness
    public final V get(long timeout, TimeUnit unit)
        throws InterruptedException, ExecutionException, TimeoutException {
      return super.get(timeout, unit);
    }

	if errCode != ErrNone {
		return errCode
	}

	cred, _, s3Err := checkKeyValid(r, signV4Values.Credential.accessKey)
	if s3Err != ErrNone {
		return s3Err
	}

	// Extract date, if not present throw error.
	var date string
	if date = req.Header.Get(xhttp.AmzDate); date == "" {
		if date = r.Header.Get(xhttp.Date); date == "" {
			return ErrMissingDateHeader
		}
	}

	// Parse date header.

        assertFalse(freshData.isPartialResults());
        assertEquals(0L, freshData.getQueryTime());
        assertEquals(0L, freshData.getRequestedTime());

        // toString should not throw exception
        assertNotNull(freshData.toString());
    }

        String[][] readings2 = { { "read2" } };
        SuggestItem item2 = new SuggestItem(text2, readings2, null, 0L, 0L, 1.0f, null, null, null, SuggestItem.Kind.QUERY);

        SuggestItem.merge(item1, item2); // Should throw IllegalArgumentException
    }

                                }
                            }
                        }
                    }
                    throw new SearchEngineClientException(response.buildFailureMessage());
                }
            }
            if (logger.isInfoEnabled()) {
                if (docList.getContentSize() > 0) {

      }
    }

    // Unfortunately this is pasted from ImmutableCollection.Builder.
    private static int expandedCapacity(int oldCapacity, int minCapacity) {
      if (minCapacity < 0) {
        throw new AssertionError("cannot store more than MAX_VALUE elements");
      }
      // careful of overflow!
      int newCapacity = oldCapacity + (oldCapacity >> 1) + 1;
      if (newCapacity < minCapacity) {

      }
    }

    // Unfortunately this is pasted from ImmutableCollection.Builder.
    private static int expandedCapacity(int oldCapacity, int minCapacity) {
      if (minCapacity < 0) {
        throw new AssertionError("cannot store more than MAX_VALUE elements");
      }
      // careful of overflow!
      int newCapacity = oldCapacity + (oldCapacity >> 1) + 1;
      if (newCapacity < minCapacity) {

  }

  private void moveHelper(boolean success, File from, File to) throws IOException {
    try {
      Files.move(from, to);
      if (success) {
        assertFalse(from.exists());
        assertTrue(to.exists());
      } else {
        fail("expected exception");
      }
    } catch (IOException possiblyExpected) {
      if (success) {
        throw possiblyExpected;
      }
    }
  }