@Override
    public boolean hasNext() {
      return true; // pretend that you have more...
    }

    @Override
    public E next() {
      // ...but throw an unchecked exception when you ask for it.
      if (!iterator.hasNext()) {
        throw new ThrowsAtEndException();
      }
      return iterator.next();
    }

    @Override
    public void remove() {
      iterator.remove();
    }
  }

      collection.retainAll(target.toRetain);
      String message = Platform.format("retainAll(%s) should throw", target);
      fail(message);
    } catch (UnsupportedOperationException expected) {
    }
  }

  private void expectReturnsFalseOrThrows(Target target) {
    String message = Platform.format("retainAll(%s) should return false or throw", target);
    try {
      assertFalse(message, collection.retainAll(target.toRetain));

                    return getToolchainV3(v4Toolchain);
                } catch (ToolchainFactoryException e) {
                    throw new MisconfiguredToolchainException(e.getMessage(), e);
                }
            }

            @Override
            public ToolchainPrivate createDefaultToolchain() {
                try {

                        return true;
                    }
                    if ("false".equals(fetchProp)) {
                        return false;
                    }
                    throw new GradleException("tests.bwc.git_fetch_latest must be [true] or [false] but was [" + fetchProp + "]");
                });

            throw new LlmException("noResultsSystemPrompt is not configured for " + getName());
        }
        return noResultsSystemPrompt;
    }

    /**
     * Gets the system prompt for document-not-found responses.
     *
     * @return the document-not-found system prompt
     */
    protected String getDocumentNotFoundSystemPrompt() {
        if (documentNotFoundSystemPrompt == null) {

   *     int}, i.e. when {@code x > 2^30}
   * @since 20.0
   */
  public static int ceilingPowerOfTwo(int x) {
    checkPositive("x", x);
    if (x > MAX_SIGNED_POWER_OF_TWO) {
      throw new ArithmeticException("ceilingPowerOfTwo(" + x + ") not representable as an int");
    }
    return 1 << -Integer.numberOfLeadingZeros(x - 1);
  }

  /**

            public CrawlingInfo getLast(String sessionId) {
                return null;
            }

            @Override
            public void store(CrawlingInfo entity) {
                throw new RuntimeException("Database error");
            }

            @Override
            public void storeInfo(List<CrawlingInfoParam> crawlingInfoParamList) {
                // Should not be called
            }

   * buildOrThrow(), or vice versa. So in particular, if we modify alternatingKeysAndValues to
   * eliminate duplicate keys (for buildKeepingLast()) then we have to ensure that a later call to
   * buildOrThrow() will still throw as if the duplicates had not been eliminated. And the exception
   * message must mention two values that were associated with the duplicate key in two different

        }
        // If any other method appears or if we forgot one, include it in the exception message:
        throw new UnsupportedOperationException(methodName);
      } else {
        try {
          return typeVariableMethod.invoke(typeVariableImpl, args);
        } catch (InvocationTargetException e) {
          throw e.getCause();
        }
      }
    }
  }

            referralData.setKey("key");
            // Should not throw exception
            referralData.replaceCache();
        }

        @Test
        @DisplayName("Should not replace cache when key is null")
        void testReplaceCacheWithNullKey() {
            referralData.setCacheMap(cacheMap);
            // Should not throw exception
            referralData.replaceCache();