@Override
  abstract ImmutableSet<Cell<R, C, V>> createCellSet();

  @Override
  final UnmodifiableIterator<Cell<R, C, V>> cellIterator() {
    throw new AssertionError("should never be called");
  }

  @Override
  final Spliterator<Cell<R, C, V>> cellSpliterator() {
    throw new AssertionError("should never be called");
  }

  @Override
  public ImmutableCollection<V> values() {

                    }
                    throw new ThumbnailGenerationException(e.getMessage());
                } catch (final Exception e) {
                    throw new ThumbnailGenerationException("Failed to process a thumbnail content: " + url, e);
                }
            }
            throw new ThumbnailGenerationException("Failed to process a thumbnail content: " + url + " (Redirect Loop)");
        });

            public ASN1Primitive toASN1Primitive() {
                // Return a primitive that will throw IOException when getEncoded is called
                return new DEROctetString(new byte[0]) {
                    @Override
                    public byte[] getEncoded() throws IOException {
                        throw new IOException("encode failure");
                    }
                };
            }
        };

                }
            }
        } catch (final InterruptedException ie) {
            throw new UnknownHostException(name);
        }
        if (q1x.ans != null) {
            return q1x.ans;
        }
        if (q20.ans != null) {
            return q20.ans;
        }
        throw q1x.uhe;
    }

    /**
     * Determines the address of a host given it's host name. The name can be a

            // original recommended version
            version = restriction.recommendedVersion;
        }
        /* TODO should throw this immediately, but need artifact
                else
                {
                    throw new OverConstrainedVersionException( "Restricting incompatible version ranges" );
                }
        */

        return new VersionRange(version, restrictions);

    } catch (InterruptedException e) {
      currentThread().interrupt();
      throw newWithCause(exceptionClass, e);
    } catch (TimeoutException e) {
      throw newWithCause(exceptionClass, e);
    } catch (ExecutionException e) {
      wrapAndThrowExceptionOrError(e.getCause(), exceptionClass);
      throw new AssertionError();
    }
  }

  @VisibleForTesting
  interface GetCheckedTypeValidator {

    Iterator<String> iterator = asList("one", "two", "three", "four", "five").iterator();
    IllegalArgumentException expected =
        assertThrows(IllegalArgumentException.class, () -> getOnlyElement(iterator));
    assertThat(expected)
        .hasMessageThat()
        .isEqualTo("expected one element but was: <one, two, three, four, five>");
  }

        } catch (XMLStreamException e) {
            throw new XmlPullParserException(e.getMessage(), null, e);
        }
    }

    public Settings read(Reader reader) throws IOException, XmlPullParserException {
        try {
            return new Settings(delegate.read(reader));
        } catch (XMLStreamException e) {
            throw new XmlPullParserException(e.getMessage(), null, e);
        }
    }

        try (CurlResponse curlResponse = dictionaryManager.getContentResponse(this)) {
            reload(updater, curlResponse.getContentAsStream());
        } catch (final IOException e) {
            throw new DictionaryException("Failed to parse " + path, e);
        }
    }

    /**
     * Reloads the character mapping items from the provided input stream.

    } catch (TimeoutException expected) {
    } catch (ExecutionException e) {
      throw new AssertionError(e);
    }
  }

  static void verifyTimedGetOnPendingFuture(Future<?> future) {
    try {
      getUninterruptibly(future, 0, SECONDS);
      fail();
    } catch (TimeoutException expected) {
    } catch (ExecutionException e) {
      throw new AssertionError(e);
    }
  }